Bio100 Midterm Study Guide

7 properties of Life |Description/Examples | | Order |All living things exhibit complex but ordered organization; structure of a pinecone | |Regulation |The environment outside of the organism may change drastically, but the organism can adjust its internal | | |environment keeping it within appropriate limits; temperature (shivering and sweating) | |Growth & Development |Information carried by genes controls the growth and development in all organisms | |Energy Utilization |Organisms take in energy and use it to perform all of life’s activities; Puffin eating fish to have energy| | |to swim | |Response to the |All organisms respond to environmental stimuli; Venus fly trap shutting when a fly touches its hairs | |environment | | |Reproduction |Organisms reproduce their own kind; hippos only reproduce hippos | |Evolution |Reproduction underlies the capacity to evolve over time; a bug changes over time to camouflage to its | | |environment | Levels of organization in the livin g world: 1. Biosphere 2. Ecosystem6. Organs-Organ Systems 3. Communities7. Tissues 4. Population8. Cells 5. Organism9. Organelles 10. Molecules and Atoms Homeostasis- The steady state of body functioning; the tendency to maintain relatively constant conditions in the internal environment even when the external environment changes. Homeostasis is dependent on negative feedback to give it signals to regulate; when a thermostat recognizes the temp has dropped it cues the heater to kick on.In negative feedback, a change in a specific variable triggers a mechanism that will reverse the change. Ecosystem Nutrients are recycled; water, minerals, carbon dioxide and decomposed organisms are used and recycled back in to the ecosystem Energy flows through; sunlight is used for photosynthesis which produces 02 Producers are photo synthesizers. Producers convert the sun’s energy to chemical energy of sugars and complex molecules. The sun enters as light and is converted to heat which is r eleased back into the ecosystem. Taxonomy- the branch of biology that identifies names and classifies species. Names are 2 parts (binomial), genus and species. Closely related species are grouped into a genus.Prokaryotic and Eukaryotic Cells |Characteristics |Prokaryotic Cells |Eukaryotic Cells | |Nucleus |No |Yes | |Cell Size |Very small |Larger | |Complexity (organelles) |Low complexity |Many | |Examples of organisms with these cells |Bacteria, archaea |Animals, humans, plants, fungus, protists | Domain Characteristics- 3 domains Domains |Archaea |Bacteria |Eukarya | |Distinguishing |Exist in extreme conditions |No nucleus |Nucleus | |characteristics |No nucleus |Cell walls contain |Unique rRNA to Eukarya| | |Single celled |peptidoglycan | | | |Cell walls contain no peptidoglycan |Unique rRNA to Bacteria | | | |Unique rRNA to Archaea | | | | |Cell membrane is made of branched hydrocarbon chains | | | | |attached to glycerol by ether links | | | |Examples of organisms |Pyrolobus fu marii, methanogens |e. Coli |Protists, plants, | |found in this domain | | |fungi, animals | Plantae- plants are photosyntheticProtist- unicellular organisms Cell structures common to both plant and animal cells: Ribosomes, golgi apparatus, plasma membrane, nucleus Unique to plants- chloroplasts, cell walls, central vacuole Unique to animals- centriole, lysosome, flagellum Evolution Evolution is the changing of organisms to produce the best offspring and have the best traits, leading to a better species of the organism; responsible for the unity and diversity in life. Darwin’s main point: Modern species descended from ancestral species, and organisms evolve by natural selection. Artificial selection accounts for the different breeds of domesticated dogs. (selective breeding)Natural Selection (mechanism of Evolution) |Observation/deduction |What does it say? | | |What does it mean? | |Observation1- Overproduction and competition |There are only so many resources available for species to live | | |on. When they over produce they will have to compete for the | | |resources; the strongest will survive | |Observation 2- Individual variation |Each ndividual within a species is different, with different | | |traits. Stronger, weaker, smarter, faster, slower. | |Conclusion- Unequal reproductive Success |The individuals with the best traits will be the ones to get the | | |resources and survive and be able to pass on these traits through| | |their offspring, leading to a species better adapted to their | | |environment. | Hypothesis driven science Scientific Process |Definition/Description |Example from rat experiment in Lab 1 lesson| | | |page | |Observation |Observing something |Rats at local pet store seem to all run in | | | |a clockwise direction on their wheels | |Questioning |Questioning that observation |Do all rats prefer to run in a clockwise | | | |direction? | |Hypothesis |A proposed explanation for a set of |There is no difference in preferen ce by | | |observations |rats as to which direction (clockwise or | | | |counterclockwise) they run on an exercise | | | |wheel. |Testing |Experiment |A sample of 100 rats (minimum sample size | | | |is 30) were selected at random for the | | | |experiment. They were split into different | | | |groups (control and experimental). The | | | |experiment was conducted multiple times by | | | |several researchers to ensure that the | | | |results were reproducible.Every rat in | | | |both groups was observed to run in a | | | |clockwise direction and therefore, the null| | | |hypothesis was rejected. | |Explanation |Conclusion to the experiment results-proven|Rats do have a preference as to the | | |or disproving the hypothesis |direction in which they run on the exercise| | | |wheel; they prefer to run clockwise. | Theory vs. Hypothesis- a theory must be supported by evidence. A good hypothesis must be falsifiable. Measurements | |Prefix |Symbol |Relation to base unit | |A. kilo |k |x 1 ,000 (1 k = 1,000 m) | |B. |centi |c |1/100 (1 cm = 0. 01 m) | |C. |milli |m |1/1000 (1 ml = 0. 001 l) | |D. |micro | µ |1/1,000,000 | |E. |nano |n |1/1,000,000,000 | The following are thus equivalent: 575 nm, 0. 575  µm, 0. 000575 mm, 0. 0000575 cm, 0. 000000575 m, and 0. 000000000575 km. Likewise 4. 63 kg is equal to 4,630 g and 463,000 cg. Temperature is usually recorded in degrees Celsius ( °C). On the Celsius scale, the boiling point of water is 100 ° and the freezing point of water is 0 °.The common temperature conversion formulae are:  °C = ( °F – 32) x 5/9 and  °F = ( °C x 9/5) + 32 Electrons- subatomic particles with a single unit of negative electric charge that play the greatest role in cellular chemical reactions and determine the chemical properties of an atom or molecule. Innermost shell can hold a maximum of 2 electrons. One or more electrons move around the nucleus of an atom. Source of energy that pumps hydrogen ions across the inner mitocho ndrial membrane Atom- the structural unit that retains the properties of an element. Becomes an ion when it gains or loses electrons. Composed of protons, electrons and neutrons.Proton- subatomic particle w/ a single unit of positive electrical charge. Electron- subatomic particle w/ a single unit of negative electrical charge. Neutron- Electrically neutral The number of electrons in the outermost shell determines the chemical properties of an atom. Atoms whose outer shells are not full tend to interact with other atoms- that is, to participate in chemical reactions. The innermost shells is full with only 2 electrons, while the second and third shells can each hold up to 8 electrons. Molecule- A group of two or more atoms held together by covalent bonds. Isotopes differ in their mass number 3CO? is three molecules of carbon dioxide.Carbon is organic |Type of Bond |How they form |Examples | |Ionic |Transfer of electrons that happen through |Table salt | | |the attraction of oppositel y charges ions | | | |such as positive calcium and negative | | | |fluoride. | | |Covalent |When one atom shares its electrons with |Methane | | |another atom. | | |Hydrogen |Occurs in water between a hydrogen and |Water | | |oxygen atom in a different molecule.A type| | | |of weak chemical bond formed when a | | | |partially positive hydrogen atom from one | | | |polar molecule is attracted to the | | | |partially negative atom in another molecule| | | |(or in another part of the same molecule). | | Water- 2 hydrogen atoms, 1 oxygen atom- is an important solvent in life because it forms hydrogen bonds. pH 7 because it is neither acidic or basic. Cohesion- The tendency of water molecules of the same kind to stick together.The strength of hydrogen bonds between water molecules allows for surface tension (spider walking on water) pH- 0 is acidic- greater H+ concentration, water is 7- equal H+ and OH+ concentration (neutral) and 14 is Basic- lower H+ concentration.. Carbon is an import ant molecule for life because it can form chemical bonds with a maximum of 4 other atoms. 4 electrons in its outermost shell (can hold 8), needs 8 to be stable and it gets the electrons by covalent bond Centrioles – Every animal-like cell has two small organelles. They are there to help the cell when it comes time to divide. They are put to work in both the process of mitosis and the process of meiosis.You will usually find them near the nucleus but they cannot be seen when the cell is not dividing. Made of Microtubules. Hydrocarbon- the simplest organic compounds which contain only carbon and hydrogen atoms. Hydrolysis- breaking of a long chain compound into its subunits by adding water to the structure between its subunits. Adding a water molecule to split two sugars apart. Consumes water. Changes polymer to monomer Dehydration reaction- A chemical process in which a polymer forms when monomers are linked by the removal of water molecules. One molecule of water is removed f or each pair of monomers linked. A dehydration reaction is the opposite of a hydrolysis reaction.Carbohydrate monomers are united into a polymer by means of dehydration synthesis Carbohydrate- A biological molecule consisting of simple single-monomer sugars (monosaccharide), two-monomer sugars (disaccharides), and other multi-unit sugars (polysaccharides). Proteins- made of amino acids. Hair and muscle. Act as enzymes. Proteins function depends on its shape Lipids-fats (oils) and steroids (cholesterols. Stores energy and produces other steroids. Fat is made of glycerol with 3 fatty acid molecules (triglycerides). Mitochondria are known as the powerhouses of the cell. They are organelles that act like a digestive system that takes in nutrients, breaks them down, and creates energy for the cell. Nucleic acids- DNA and RNA, provides the directions for building proteins. Made of nucleotides.A>T and G>C Polysaccharides- sugars Soften a fat- create more double bonds with carbon atoms in t he fatty acid chains. More hydrogen atoms in saturated fats make them remain solid at room temp. Enzyme- may contain the organic molecule –NH?. Special type of protein that causes metabolic reactions to proceed at a much greater rate than they normally would. Their function depends upon their three-dimensional shape. Three factors that can affect the observance of enzymes is temperature, pH and the presence of catalase. A protein that serves as a biological catalyst, changing the rate of a chemical reaction without itself being changed in the process. DNA- made up of nucleotides.DNA makes RNA; RNA makes protein Benedict’s test- reducing sugars, green, yellow, red is positive. Blue is negative Sudan III test- testing for fat, red spot is positive Biuret test- protein, pink or purple is positive Iodine test- starch, positive is dark brown or black Hydrogen Peroxide- enzyme activity (liver, lunch meat) bubbles are positive Robert Hooke- first to use the term cell to descr ibe the basic unit of life. Surface to Volume ratio (Surface area / Volume)- a small cell has a larger sa>v ration than a larger cell. When the outside surface area is smaller than the inside volume the cell cannot pass material in and out as effectively as when the surface area is larger than the volume | CUBE 1 |CUBE 2 | |Surface Area: |1cm x 1cm x 6 sides = 6cm2 |10cm x 10cm x 6 sides = 600cm2 | |Volume: |1cm x 1cm x 1cm = 1cm3 |10cm x 10cm x 10cm = 1000cm3 | |SA/V: |6cm2/1cm3 = 6. 0 cm2/cm3 |600cm2/1000cm3 = . 6cm2/cm3 | |Rf = |Distance the pigment traveled | |   |Distance the solvent traveled | | |  Ã‚  Ã‚  (solvent front will be near the paper clip) | For example, if the solvent travels 10 cm, and the pigment travels 3 cm, the Rf value for that pigment would be: 3 cm/10 cm = 0. 3000 (four decimal places) Ribosomes- found on the surface of Rough ER. Synthesizes protein Nucleus- contains and replicates DNANuclear membrane- the â€Å"envelope† there is pores and spaces for RNA and proteins to pass through while the nuclear envelope keeps all of the chromatin and nucleolus inside. Cytoskeleton- maintains cell shape, anchors organelles, and moves parts of the cell. A meshwork of fine fibers in the cytoplasm of a eukaryotic cell; includes microfilaments, intermediate filaments, and microtubules. Cell walls; plant cell walls are composed of cellulose. A protective layer external to the plasma membrane in plant cells, bacteria, fungi, and some protists; protects the cell and helps maintain its shape. Cell membranes are composed of lipids and proteins; it separates the cell from its surroundings.Called the Fluid Mosaic† because molecules can move freely past one another and mosaic because of the diversity of proteins that float like icebergs in a phospholipids sea. Cytoplasm- Everything inside a eukaryotic cell between the plasma membrane and the nucleus; consists of a semi fluid medium and organelles; can also refer to the interior of a prokaryo tic cell. Chloroplasts- the organelles that perform photosynthesis in plant cells and some protists. Located in the cytoplasm within the plasma membrane. Enclosed by two concentric membranes, a chloroplast absorbs sunlight and uses it to power the synthesis of organic food molecules (sugars).Chlorophyll- A green pigment in chloroplasts that participates directly in the light reactions. Chlorophyll a-the chlorophyll that is used during light reaction and is in the reaction center of the photosystem Chlorophyll b- broadens the range of light a plant can use Carotenoids- absorbs extra light that could damage the chlorophyll Anthocyanin- protects the plant from UV damage Genes- Chromosomes are made up of DNA. Segments of DNA in specific patterns are called genes. Your genes make you who you are. You will find the chromosomes and genetic material in the nucleus of a cell. In prokaryotes, DNA floats in the cytoplasm in an area called the nucleoid. Lysosome- aids is digestion Plasma membra ne- major lips are phospholipids.The thin layer of lipids and proteins that sets a cell off from its surroundings and acts as a selective barrier to the passage of ions and molecules into and out of the cell; consists of a phospholipid bilayer in which proteins are embedded. Golgi apparatus- protein modification. An organelle in eukaryotic cells consisting of stacks of membranous sacs that modify, store, and ship products of the endoplasmic reticulum. Central vacuole- A membrane-enclosed sac occupying most of the interior of a mature plant cell, having diverse roles in reproduction, growth, and development. Aids in storage Microtubules- cell shape Nucleolus- The nucleolus is a non-membrane bound structure [composed of proteins and nucleic acids found within the nucleus. Ribosomal RNA (rRNA) is transcribed and assembled within the nucleolus.Cilia- hair-like structures on the outside of a cell that create movement through a back and forth motion Flagella- tail-like structure on the ou tside of the cell that helps move the cell along Food vacuole- sac that buds from the plasma membrane to help the lysosome release enzymes that digest the food molecules that provides energy to the cell. Cellular respiration- conversion of the energy stored in food molecules to energy stored in ATP. Glucose is used as food and carbon dioxide is produced as waste. Formula is 6CO2 + 6H2O =C6H12O6+6O2 (6 molecules carbon dioxide + 6 molecules water=1 molecule sugar + 6 molecules oxygen). Cellular respiration varies from breathing because it is required to share 2 gases with its surroundings and breathing shares 2 gases between blood and surroundings. Stages are Glycolysis, Citric Acid Cycle and Electron Transport Aerobic= 4, anerobic= 34Cellular responses involve transduction of an external signal Paramecium- single celled organism (Protist) with a nucleus (eukaryotic cell) and small hair-like structures (cilia) Osmosis- water moves from the lower solute concentration to the higher sol ute concentration. A type of passive diffusion where water moves down the concentration gradient through a semi-permeable membrane. Hypertonic- In comparing two solutions, referring to the one with the greater concentration of solutes. Hypotonic- In comparing two solutions, referring to the one with the lower concentration of solutes. If a cell is placed in it, water will move into the cell from the surrounding solution. Energy- capacity to perform workKinetic energy- energy of motion (muscle moving) potential energy- Energy that something has because of its location. A rock on the top of the mountain contains potential energy entropy- the measure of the amount of disorder or randomness in a situation Principles of conservation of energy- it is not possible to create or destroy energy. Can only be converted from one form to another. ATP molecules- main energy carriers in cells. ATP synthesis occurs in the mitochondrion Active transport requires ATP, passive does not. Facilitated tra nsport occurs by means of transport proteins Diffusing molecules move down their concentration gradients until they are evenly distributed.If a human cell were placed in water, it sells because water is diffusing across the plasma membrane from a region of high concentration outside the cell to a region of low concentration inside the cell. Endocytosis- The movement of materials in to the cell Exocytosis- The movement of materials of out the cytoplasm of a cell via membranous vesicles or vacuoles Phagocytosis is a type of endocytosis in which a cell engulfs another cell. A cell engulfs a particle by wrapping pseudopodia around it and packaging it within the vacuole Pinocytosis- cellular drinking Receptor-Mediated Endocytosis – the movement of specific molecules into the cell by inward budding vesicles. The vesicles contain proteins with receptor sites specific to the molecules being taken in.Polypeptide- a chain of amino acids that have been linked together by dehydration syn thesis Light reactions take place in the thylakoid membrane. Source of electrons is H? O. The first of two stages in photosynthesis, the steps in which solar energy is absorbed and converted to chemical energy in the form of ATP and NADPH. The light reactions power the sugar-producing Calvin cycle but produce no sugar themselves. Photosynthesis- light excites the electrons in chlorophyll to a higher energy state. Energy is released and used to create ATP when electrons are passed down the energy hill during the light dependant reactions. The process by which plants, algae, and some bacteria transform light energy to chemical energy stored in the bonds of sugars made from carbon dioxide and water. CO2 + 6H2O =C6H12O6+6O2 (6 molecules carbon dioxide + 6 molecules water=1 molecule sugar + 6 molecules oxygen) Calvin Cycle- makes sugars during photosynthesis in the Stroma. The Calvin Cycle uses the products of the light reactions (which are ATP and NADPH) to power the production of sugar from carbon dioxide. The enzymes in the Calvin cycle are dissolved in the Stroma, the thick fluid within the chloroplast. ATP generated by the light reactions provides the energy for sugar synthesis. And the NADPH produced by the light reactions provides the high-energy electrons for the reduction of carbon dioxide to Glucose. Thus, the Calvin cycle indirectly depends on light produce sugar because it requires the supply of ATP and NADPH produced by the light reactions.Energy transfer- pigment molecules>chlorophyll a> primary electron acceptor Electron transport train- electrons pass from one carrier to another, releasing a little energy at each step Photosystem- A light-harvesting unit of a chloroplast's thylakoid membrane; consists of several hundred antenna molecules, a reaction-center chlorophyll, and a primary electron acceptor. Rough ER was mentioned in the section on ribosomes. They are very important in the synthesis and packaging of proteins. Some of those proteins might b e used in the cell and some are sent out. The ribosomes are attached to the membrane of the ER. As the ribosome builds the amino acid chain, the chain is pushed into the ER. When the protein is complete, the rough ER pinches off a vesicle. That vesicle, a small membrane bubble, can move to the cell membrane or the Golgi apparatus. Smooth ER- has its purpose in the cell. It acts as a storage organelle. It is important in the creation and storage of steroids.It also stores ions in solution that the cell may need at a later time. vesicle is a bubble of liquid within another liquid, a supramolecular assembly made up of many different molecules. More technically, a vesicle is a small membrane-enclosed sack that can store or transport substances. Vesicles can form naturally because of the properties of lipid membranes (see micelle), or they may be prepared. Artificially prepared vesicles are known as liposomes. Most vesicles have specialized functions depending on what materials they cont ain. Water-splitting photosystem when oxygen is produced Osmoregulation- animal’s ability to survive if its cells are exposed to hypertonic or hypotonic environment

New Mexico’s Border Issues

Illegal immigration refers to the immigration of people across national border without visa or valid documents. The illegal immigration give rise to a larger set of social issues in areas, such as economy, social welfare, education and health, smuggling and crime. The international border between United States and Mexico runs for about 3,141 km which is frequently crossed over by countless illegal immigrants from Mexico. The reason for these illegal crossings is the difference in living standards and wages in US and Mexico. Even though there large group of border patrol personnel’s guarding the border, alien immigrants can still sneak in through various locations due to lack of funds and consistent patrol in the area. .According to an estimate over a million people who cross over to US, 45 percent end up in   becoming agricultural labors in various US states. The economic and social costs of illegal immigration are enormous. It is estimated that about 10,000 illegal aliens cross into US every day with annual figure reaching to   of 3 million. A third of these immigrants are caught and returned to their home country; while half of them become US residents permanently.   About 9 to 11 millions illegal immigrants reside in US at present. Due to the acceptance of low wages by illegal immigrants in New Mexico and other states, about1.8 million native workers suffer loosing not only their wages, but also jobs raising the cost of state welfare to US$ 15 billion annually. According to the National Academy of Sciences it costs $89000 to pay for an alien immigrants during his lifetime stay in US. However its not only the loss of job or revenue, but 80 percent of cocaine and 50 percent of heroin in US is smuggled through new Mexico borders by these illegal immigrants. The illegal immigrants cost billions of dollars every year to the American taxpayers; especially the free treatment offered to illegal aliens. Due to which many hospitals New Mexico, Arizona and California has been closed down. The total economic cost of illegal immigrants is estimated to in between 67$ to $87 billion. Since   1986 US has embarked efforts to restrict illegal immigration with the arrival of Immigration Reform and Control Act (IRCA) which expanded the funding for the US border patrol. Between 1986 and 1996, Congress and President took a series of restrictive actions to regain the control of US and Mexico border. However despite these measure and IRCA act, both legal and illegal immigration continued to rise. The federal government in 1993 initiated another plan to install more officers at the border. These plans have fundamental weakness due to less defended border at many areas. For example when mobilization of forces was activated in El Paso and San Diego, the flow of migrants turned to Arizona and Texas creating new problems in these states. The push by US authorities pushed the immigrants to cross over from more remote deserts and mountains and rivers where its much more hard for border patrol to capture them. Another loss has been the higher rate of injury and death that also accelerated the cost of spending on already poor counties in New Mexico and border states. Even though the Border Patrol budget has been increased 10 times between 1986 and 2002, but the arrival of immigrants has also risen. In 2005, New Mexico declared emergency due to the rise in drug smuggling, kidnapping and murder in the state. The State governor criticized the federal government and Congress by mentioning total lack of support from the Border Patrol.   In recent days the illegal immigrant issue has become a national debate with politicians on both sides favoring and disfavoring the issue due to their own vested interests. There have been suggestions to construct fence, wall, and deployment of more Border Patrol agents to address the cross border issue. In reality the problem is much bigger than it seems. Constructing a few miles wall or fence will not bring any change, unless realistic approach is taken to tackle the issue. Even after the constructions of fence in San Diego the flow of immigrants increased; as fence provides an excuse for Border Patrol to be less careful Analyst believe that US polices have failed to produce any result. A new approach is needed to address the issue. The solution to the problem lies in the undocumented migration, which if made legal can prove   more productive.   Under the current immigration law, all countries have same quota of 20,000 thousand legal immigrants per year; which is same for the Mexico, the closest US neighbor.  Ã‚   A more realistic policy would be to   provide temporary visas, (which President Bush has recently announced), however greater emphasis should be paid to the Mexicans; as Mexico is the major part of the problem. Reference CNN, (August 13, 2005). Border emergency declared in New Mexico. Retrieved February 8, 2007, Web site: http://www.cnn.com/2005/US/08/12/newmexico/ 2.  Ã‚  Ã‚  Ã‚  Ã‚   Economic Cost of Illegal migration. Retrieved February 8, 2007, Web site: http://www.cairco.org/econ/econ.html 3.  Ã‚  Ã‚  Ã‚  Ã‚   Douglas S. Massey, Beyond the Border Buildup. Retrieved February 8, 2007, Web site: www.ailf.org 4.  Ã‚  Ã‚  Ã‚  Ã‚   Fencing in Failure. Retrieved February 8, 2007, Web site: http://www.ailf.org/ipc 5.  Ã‚  Ã‚  Ã‚  Ã‚   America Org, Illegal immigration a ‘real issue'. Retrieved February 8, 2007, Web site: http://www.americas.org/                                             

The film Frankenstein Essay Example | Topics and Well Written Essays - 500 words

The film Frankenstein - Essay Example Finally Frankenstein manages to put life into his imagination. The reborn dead body played by Robert monster was first quite and pleasant but Fritz torments monster and so his criminal brain begins to catapult into a fully criminal behavior. Fed up by the criminal behavior of monster Frankenstein leaves him with his mentor Dr.Waldman. The monster escapes from Dr.Waldman and comes to village to take revenge on Frankenstein. Before escaping monster kills both Fritz and Waldman since Fritz was torturing him with fire and whips and Waldman was about to dissect him to dispose. After escaping from the castle the monster went to Elizabeth's bedroom seeing him she screams and he flees. The manhunt is on for the monster and is found in the mountains. He over powers Frankenstein and ties him to a windmill. The windmill is seta fire and eventually it falls on the monster and he burns to ground. Frankenstein is shown carried. The movie was really close to what Mary Shelly has written in her novel. The direction was so appropriate that it brought the darker side of the story to the silver screen. Shelly was trying to make it clear in the novel that science should not tamper with life. The movie miserably fails to make shelly's point clear.

Class student dicussions answers Assignment Example | Topics and Well Written Essays - 500 words - 1

Class student dicussions answers - Assignment Example Good illustration for giving a protocol which operates in the network layer. I agree with you based on the explanation of the protocols. The Loki tool illustration is well explained as well the relevant examples provided. I could also add that ICMP does not support broadcast or multicast traffic. Good explanation about the ZoneAlarm firewall, in that its combination as an antivirus and a firewall makes it an ideal tool to utilize. The need for a tool like this in a business environment is of great importance especially this era of internet/information systems are prone to hacking. Kevin, the explanation you have given is too shallow in that someone cannot be able understand what you mean by the layer being contact with most people. You could have stated your argument that the application layer defines the interface for users to communicate their process and data transfer in network. Kevin, you could simplified that the application layer provided an interface for operations and acts as a virtual terminal. I agree with you on the application layer’s vulnerability. You provided a good example of its weakness and a good definition of phishing. Your argument of using firewalls and anti-virus is also justified. User training and awareness is also important as part of information systems security but it needs the hand of information systems security to implement a secure platform in order to achieve security. The explanation of Comodo Firewall is good but I suggest you could have added its advantages over other firewalls and also include its weaknesses. David H, yes, I agree with you that employees might require accessing organization data while they are away from office or from within the range of company’s LAN. You can also argue the benefits of using VPN for employees, for instance you can say that, VPN improves productivity of

Interviewing a relative or friend about managerial accounting Essay - 1

Interviewing a relative or friend about managerial accounting techniques used in their work and writing a summary of the interview - Essay Example I took the opportunity to go to Kim’s company since I did not want to interview him at home. I met his secretary who allowed me to go and see him. I wanted our conversation to be as formal as possible since I had interacted with him on other platforms. After some orientation on the operations of the company, I engaged Kim with questions. Firstly, I focused on understanding the costing systems in the company. Kim was aware that there was a cost accounting system that the company used though he did not know precisely what is was called. However, he was quite clear that the overall cost of production required to be considered in the resource management. Since the company does not have many operations, Kim said that they have simplified financial control system to ensure that operations are run efficiently. At Km’s company, the review of the costing systems is usually done after every one year citing issues of inflation and changing economic patterns. Being a senior manager, Kim has a role in financial decision making in the organization. The senior management usually meets weekly to deliberate on the company operations, trends, acquisitions among other issues. The company uses the break-even analysis in making its financial decisions. This ensures that the company is capable of getting to know its position relative to its profitability. Kim plays a major role in decision-making. As a senior manager, he has a vote in facilitating a consensus on the way the resources in the company are to be spent. In addition, he has the role of ensuring that his department ‘is allocated the resources that are required. In the management, he has the role to defend his projected expenditures as well as giving financial reports on the operations within the department. Kim tells me that the organization is very keen on its budgets. The budgets are

In what ways isthe study of intercultural communication theory Essay

In what ways isthe study of intercultural communication theory relevant to international students, or not - Essay Example (Raymond Williams, Key Words, 1983:87) It is important to first understand the concept of intercultural communication and its importance. Intercultural communication in the simplest terms is the exchange of information and ideas across different cultures and various social groups. Since, the world today is portrayed by a huge number of contacts between people often resulting in the communication between people with distinctly different culture backgrounds and linguistics. It is important to overlook the needs of communication, without any misunderstandings and collision across the cultures. The study of intercultural communication is significant for international students as it can help them to understand and recognize the nature of different linguistics, also it will help them to compare the similarities and differences between their and other’s cultures. There are cultures and sub-cultures within a culture. Students staying or thinking to apply to other countries need to develop the importance of understanding of cultures and their languages. Students engage and communicate with other international students to up bring the best of relationships. Intercultural communication is becoming gradually more essential due to the rise of globalization and also with the rise of multi-cultural job environments. Not all students get to receive the positive welcome from the students of other universities. Students often face difficulties while applying aboard, in foreign countries. Thus, in today’s age, students of college level need an education that will provide them with a set of helpful skills such as, â€Å"communication skills† this process will allow the student to compete in an increasingly developing global market with gradually increasing educated population. Social networking sites have played a vital role in promoting and fostering intercultural communication. Young generation use social networking sites for interaction and

Do the question 1 write a report how to get the number and analysis Coursework

Do the question 1 write a report how to get the number and analysis it, - Coursework Example d contractual right to obtain residual payments of 12.5% of the profits on the sale for such items as phonographic recordings that were sold to the public. Ms. Lee did not receive the whole $ 9 million nevertheless she settled the case with Disney and received a milestone settlement of almost $ 2.3 million that represented a portion of her part of the returns made from the sale of the videocassette on the film Lady and the Tramp. Ms. Peggy Lee received nearly $ 3,500 for working on a film that may have earned millions of dollars. Therefore, the calculation of damages, according to Ms. Peggy Lee and her attorneys for the breach of contract that resulted in Disneys offer of a comparatively trivial amount of $ 381,000 involved the point that her interpretation of the contract with Disney was that she was eligible to 12.5% of the profits made from the sales of the movie on DVD and videocassettes. Ms. Peggy Lee had to convince the jury that the DVDs and video cassettes were not covered in her original contract with Disney for her to be entitled to far more money than the $ 381,000 that was calculated by Disney. The glitch for Ms. Peggy Lee and Disney was due to the fact that videocassette technology was not something that either party anticipated back in 1952 and the main concern in the case is whether the utilization of Ms. Peggy Lees songs and her voice on the videocassettes was not ratified in the language contained in the initial

Critically discuss the leadership and change management theories Essay

Critically discuss the leadership and change management theories within the case study - Essay Example Biogen Idec is a global biotechnology company that has transformed greatly in the past 25 years to become one of the largest companies in the world. Through mergers with other companies, it has developed into a big company with presence in most parts of Europe and America. Currently, the company is on the verge of changing its operations in order to improve the performance of the company. Managing change is an important aspect of the organization in order for them to remain competitive by responding the market needs. The concept of organizational change and leadership management require a lot of concern since any mistake may lead to big losses (Styhre, 2002; Charlton & Andrew, 2004). Organizations operate in increasing competitive and chaotic global business environment and thus it should form a major focus of the business management. This is because there is enough evidence that about 70% of organizational changes fail to yield enough fruits as projected by the management (Burnes & Jackson, 2011). A properly structured organizational change should thus take full care of content, people, and process since they are the determinants of success or failure of such an initiative (Myungweon, 2011). Leaders are the formulators and implements of any organizational change; hence, they should be responsible for the success or failure of such initiatives (Aaron & Elizabeth, 2012). Leaders are also important to the change process since they create and develop an acceptance culture of change in the organization and develop the ability to achieve such as change as projected by the company (Northouse, 2012). Change Models Kotters 8 Steps The use of Kotters method is evident in the change undertaken by Biogen Idec Inc since they began their initial step of organizational change by conducting research and creating urgency for change. In this method, organization change can be effectively managed using a dynamic 8-step approach that includes increased urgency, building grid team s, get the right vision, communicate for a buy in, enable action, create a short term win, don’t let up, make it stick. The steps are further divided into three phases whereby the first phase is creating a climate change; the second phase is engaging and enabling the whole organization while the last step entails implementing and sustaining the change (Hayes, 2010). Creating urgency This is the first step of Kotters change model whereby he argues that creating urgency enables the members know what they really want and develop a sense of urgency around the need for change. In the case of Biogen Inc, the headquarters in Paris was responsible for all finance, legal, Human resources, and commercial activities of the organization, making the decisions slow and bureaucratic. The urgency created by the management is upon realization that this type of organizational structure is slowing decision making and at times leading to erroneous decisions. They thus needed a structural model t hat can quicken decision making of the managerial functions to avoid several errors that may inhibit the development of the company. Creating urgency helps spark the initial motivation of the workers so that they respond by getting things moving in the direction of change. It involves showing people the poor performance of the organization and increased competition that threatens the existence of the company. Kotter (2012) argues that about three quarters of the organization management needs to support the change initiative for it to be successful hence, the need for creating urgency must be very strong. Form a powerful coalition After the worker have seen the need for change, they need to work together to achieve these desired changes. This step involves convincing people that change is necessary and it encompasses strong governance and sustenance from individuals within the organization. In order to influence the process of change within the organi

The Other mother Essay Example | Topics and Well Written Essays - 750 words

The Other mother - Essay Example Abrams writes out of her true experience, reconstructing her life together with her partner and daughter from her own personal journals, a record of her emotions and thoughts about the situation, and from her memory and the people around her during the time that the events took place. Abrams, in her author’s note in the book, reveals to the reader that she wrote the book during the time when she had no contact with her daughter. The story is told in a first-person narration. The narrator starts out with telling how her relationship with Norma blossomed from friendship to love, from being friends to starting out a relationship. Eventually they moved in together despite the narrator’s indecision because of Norma’s seemingly untruthful revelation of herself, her past life and who she is. While their relationship is going to the road of partnership, Norma decided that she wanted a baby of her own. At first, the narrator didn’t like the idea of her partner getting pregnant and herself being a mother. She had doubts but Norma was able to persuade her to the idea and they began planning it out. They searched for a sperm donor, bought baby clothes and items and attended childbirth classes as preparation. The narrator recounted the difficulties she had experienced during Norma’s pregnancy. She needed to face the hormonal instability of her partner, the whims and tantrums, including the ad ditional chores she needed to do because either Norma didn’t want to do it or was not allowed to do it. She also recounted her family’s reaction and other people’s reaction towards the pregnancy. Some approved, most expressed their concern. It was not a normal situation, lesbian partners strolling around, with one partner with a large belly carrying a child within. While Norma was having hormonal imbalances and tantrums, the narrator was also having emotional turmoils of her own, though eventually, Norma’s pregnancy brought excitement of her