Life on Earth Worksheet Essay Example for Free

Life on Earth Worksheet Essay Taxa to explore – Elephants. 1. Review terms (write definitions for these terms) Extant Species, families, or groups still in existence Extinct Species, families, or groups no longer in existence, end or died out Genotype Genetic make-up of an organism Phenotype Physical attributes of an organism, observable or measurable traits Synapomorphy Shared characteristic that are inherited from most recent common ancestor Background: There are three extant species of elephant: Elaphas maximus (Asian elephants), Loxodonta africana (African elephants), and Loxodonta cyclotis (African forest elephants). Their taxonomic hierarchy is as follows: Kingdom: Animalia Phylum: Chordata Class: Mammalia Order: Proboscidea Family: Elephantidae Genus: Elaphas Species: maximus Kingdom: Animalia Phylum: Chordata Class: Mammalia Order: Proboscidea Family: Elephantidae Genus: Loxodonta Species: africana Kingdom: Animalia Phylum: Chordata Class: Mammalia Order: Proboscidea Family: Elephantidae Genus: Loxodonta Species: cyclotis 2. Collect an image of each species. You will submit these as a part of your assignment. (see full assignment instructions) 3. Looking at these pictures, can you think of any EXTINCT animal or animals that might be a close relative of modern elephants? List it/them below. If you know the scientific name (genus and species) then you can put that. If you aren’t quite sure, just give the common name. Mammoth 4. Now think about EXTANT taxa. Identify 2 animals that you might expect to be the closest LIVING relative to the elephants. List it/them below. If you know the scientific name (genus and species) then you can put that. If you aren’t quite sure, just give the common name. Possible Relative A Possible Relative B Rock Hyrax Manatees 5. For the closest EXTANT relatives, what characteristic(s) of that animal or its habitat led you choose it as â€Å"probable closest relative†? (consider geographic location, size, anatomy, behavior etc). Be specific. Characteristics of Animal A Characteristics of Animal B -found across Africa and the Middle East -typically live in groups -has a prominent pair of long, pointed tusk-like upper incisors -In males, the testes are permanently abdominal -thick, wrinkled skin -Females have two teats, one under each flipper -teeth growing at the rear are continuously replaced throughout life Now to the science – Follow the link below to read about some of the extinct relatives of elephants http://palaeo.gly.bris.ac.uk/Palaeofiles/Elephants/firstelephants.html 6. How were the phenotypes of ancient proboscideans different from those of extant elephants? The ancient proboscideans differ from those of extant elephants because they have multiple pairs of molars and premolars, they do not possess tusks, and they retain canines on the upper jaw. 7. Based on the information in the web-site, where did the early proboscideans evolve? The early proboscideans evolved from Africa. More derived proboscideans (not ancient, but not extant either) also had a very different geographic distribution than elephants today: http://palaeo.gly.bris.ac.uk/Palaeofiles/Elephants/extinct_taxa.html http://palaeo.gly.bris.ac.uk/Palaeofiles/Elephants/mammoths.html 8. Which localities seem most surprising and why? North and South America because these locations were once abundant with these animals, such as mastodons, while having most of the animals originate from  the other side of the world. 9. Identify 4 synapomorphies that are shared between ALL of these extinct and extant taxa. 1. Tusks 2. Incisors and molar teeth 3. Trunk 4. Four column-like legs Molecular phylogeny In extant species, relationships can also be reconstructed based on DNA Think back to your best guesses of the closest EXTANT relatives of the modern elephants. Look at the .pdf named â€Å"Afrotheria†. The phylogeny described in this paper is based on molecular data (similarities in DNA sequences) 10. Based on that phylogeny, write in the sister taxon (taxon A) to Proboscidea. Give the formal name. Taxon A or Sirenia Proboscidea 11. Write in the taxon (taxon B) that is sister to the clade composed of (Proboscidea + Taxon A). Give formal name Taxon B or Taxon A Proboscidea Hyracoidea 12. Perform an internet search for these two taxa and find out their common names. What are their common names? Describe each.  The common name for Sirenia is Sea Cow. Sea cows are fully aquatic, herbivorous mammals that appear fat. They have forelimbs used for steering and a tail used for paddling. The common name for Hyracoidea are hyraxes. Hyraxes are well-furred animals with short tails and have poor internal temperature regulation. What was your thought/reaction upon discovering what these creatures are? My thought reaction was how can animals that look nothing alike be similar to an elephant if they visually look different. Believe it or not, there are morphological (phenotypic) similarities as well as dietary and behavioral similarities between all of these taxa. BEFORE molecular data was available, scientists already suspected that these groups were closely related. The DNA evidence only helped to confirm the relationships. We’ll do more on that in a moment. 13. Search the web to find at least two non-molecular synapomorphies between each of your modern taxa and the elephants: (be specific!) Animal #1 name Rock Hyraxes Rock Hyraxes are furry and have the soles of the feet with large, soft pads that are kept moist. Manatees have paddle like flippers and a snout. Animal #2 name Manatees 14. Which of the features you listed are more likely to survive in the fossil record? Explain why. Most likely to survive in the fossil record is the snout because it consists of the bones of the jaw which are very good for becoming fossils. 15. Which are less likely? Explain why. Less likely are the fur, soft pads at the feet, and the paddle-like flippers because all are more prone to decay rapidly because of being soft structures. The flippers are also more prone to not preserving quickly therefore eaten or broken down by aerobic microbes. Now for molecules: To see the actual molecular data used to create the phylogeny you saw, select the .pdf named â€Å"mammoth and sea cow†. 16. Go to page 409. Dots mean the base pair (A, C, T or G) is the same as is listed in the taxon that’s at the top (this saves ink!). Now compare the sequences for the African elephant and the Asian elephant in just the top row of page 409. How many molecular differences do you see in the sequence shown? There are 8 molecular difference in the sequence. How many molecular differences do you count between the African elephant and the hyrax? There are 11 molecular differences between the African elephant and the hyrax. 17. Based on anatomy alone (without the molecular evidence), would you have guessed that the animals in photos above represented the closest living relatives of elephants? Why or why not? Honestly, based on the anatomy alone, I would not have guessed that the animals represent close relatives of the elephants because of the physical anatomical characteristic they have. Most animals can have similar anatomy with slight differences that contribute to their survival in an environment. Initially, I thought that the animals had similar characteristics only because of natural selection and adaptation of their environment not because  of their common ancestor. This shows how molecular evidence can really help in seeing what animals belong in what lineages.

Ethics in Teaching :: Education Philosophy

Ethics in Teaching Ethics should be a main concern when a teacher is deciding how to teach and what he/she plans on teaching. Ethics are the morals that a person believes in. A central concern is a main idea. I looked up pedagogy in the dictionary and its definition is the state or art of teaching. Therefore, when I hear the phrase, "Ethics must be seen as a central concern of critical pedagogy," said by Henry A. Giroux, I believe that he means morals used in teaching need to be looked upon with high regards and also very carefully when a teacher is teaching. Ethics in teaching can have both positive and negative effects for the students. I believe that teachers in elementary school and middle school should set an example for their students. They can do this by being responsible, treating people fairly, and respecting their elders. When a students sees his/her teacher doing this, the student will then want to be like the teacher and follow the teachers example. Several students do not have very positive environments at their homes. The teachers may be the students only image of a good citizen. Once a student gets into high school, he/she has already developed his/her own morals and values. This is a time when a teacher can get into a lot of trouble when giving his/her opinion on certain subjects such as religion, race, and abortion. The teacher should try to avoid talking about these topics if at all possible. The teachers should still act as an example of good human being for the children by treating people fairly, being courteous, and being responsible. In Freire’s Pedagogy of the Oppressed, Freire often talks about two contrasting teaching styles. One involves a banking concept where the teacher lectures all of the time and tries to put the information into the student’s head as if he/she was a robot.

Alternatives for the decision regarding the high lead found in the whistles Essay

The situation of determining how to handle the recently discovered high lead content in the large whistles order is a difficult one that will in some way affect the company. Three alternatives have been made to allow options for this decision. Alternative 1: Say nothing; allow the whistles shipment to go without notifying the customer. Alternative 2: Replace the customer’s order by providing whistles that meet the appropriate company standards. Alternative 3: Contact the customer and explain the situation, offer them a discount for on the whistles that are lower than the company standard. Decision Process The process for choosing the three alternatives began by identifying the decision to be made. The decision at hand is what to do with the information discovered about the order of whistles going to a school in South America. This is a big decision that will affect the company in each alternative. The next step of the process is listing options possible for the situation, and then studying those options by listing advantages and disadvantages of each. Then the decision was made by choosing the best overall solution for the decision. And lastly the decision was evaluated to determine if the results were what was expected. The three options for this decision are listed above; say nothing to the customer, replace the order, or try to make a deal for the customer. Each option is motivated by a result that will benefit the company financially, ethically, or a mixture of both. The idea behind the alternative 1 decision was to save money upfront and not bother with order changes and other inconveniences for the company. In studying this option the advantage of this would be to save money and time for the company. The disadvantage would be a possibly unhappy customer, an unethical move which could make employees see the company as being unfair; giving a poor product that could be hazardous to children. The legal ramifications of this alternative would be risky if the a child became ill from the use of the whistles and the company was blamed, sued, etc. The idea behind the alternative 2 decision was to replace the customers order with whistles that are not potentially hazardous and meets the company standards. The advantage of this option is not putting the company in an unethical situation of trying to pass products that are under par for high quality. This will help set a standard of ethics in the company that could motivate employees to do good work. The disadvantage of this option is that it will cost the company $100,000. The financial loss could take a long time to recover from, the positive influence on employees won’t immediately compensate for the loss. There would not be a legal issue with this option. The idea behind the alternative 3 decision was to try and contact the customer and explain the situation and let them decide if they would like the whistles replaced or to take the hazardous whistles at a discount. The advantage of this alternative is that the customer could decide to keep the original whistles which would still save the company a considerable amount of money cutting the losses to a much smaller amount. Also it would show that the company had the customer’s best interest in mind. The disadvantage of this option is that it could reflect negatively on the company still because we can’t really determine how the customer will feel about the whistles that are potentially hazardous. They customer might think that the company is trying to cut corners and save themselves money. This would be bad for future business. Legally the customer would probably not try and sue the company, but there is still the potential issue of the company being reported as manufactur ing products with too high of a lead content. This would kill the company’s reputation and the customer relationships of other clients. Recommendation Alternative 2 is the recommended decision; replacing the customer’s order by providing whistles that meet the appropriate company standards. This decision was made by both ethical and financial decisions. Ethically this alternative is the most appropriate. The customer contacted the company to provide a product to be used in the South American schools. It would be unethical to provide the customer with a product that is below the company and country standards even though they are not violating the South American standard. The customer chose this company over a foreign company to give a quality and safe product. This recommendation will positively affect the company because they will possibly become more favorable in the eyes of the customer, with the possibility of more business in the future from them and their business relations. This option was chosen not only for company recognition, but also to save children from a potentially hazardous experience. This option will be a great cost to the company, but the positive experience from both the customer and employees. By creating a culture of â€Å"wanting to do what is right† will help future sales and the company will gradually earn the loss in funds back over time. Customer relationships Considering the outcome on the customer relationship is an important part of the decision making process. We have to ask ourselves how will the customer feel about our decision, how will it influence them and how will it influence the company? By choosing alternative 2, to replace the whistles, the company will look favorably to the customer, being the school buying the whistles. Though the company will merely be providing the product that was originally agreed upon for the initial sale, the customer will realize that the company is sacrificing to replace the whistles and they will go away with a positive relationship with the company. This experience is sure to foster future business from the customer because of the positive experience they experienced. They will also be more likely to recommend the company to their peers and the company could gain substantial business from the experience. The children who would be ultimately affected by the quality of the whistles will feel good about receiving a quality, non-hazardous product, and the parents of the children will be grateful knowing that the company behaved ethically. This could also create future business for the company by providing the children and parents with a positive experience from the company. The company employees will see the standard of ethics portrayed by the company and it will reflect in their work. By giving an example of a high ethical standard it is likely that employees will take greater pride in their work which will affect the company in a positive way. The company’s decision will affect multiple stages of people, their feelings, thoughts, and behaviors will help the company in the long run to regain the loss taken from replacing the whistles. The financial gains will be gradual yet immeasurable in the long run of creating a company with a superior ethical standard. Social Responsibility In a corporation, social responsibility is behaving ethically as individual workers and together as a company to be sensitive toward social, cultural, economic and environmental issues. This means that the company doesn’t always do what’s best for its self but rather do what is best for their environment, customers, employees, culture, etc. Social responsibility is a big part of the decision making process because decisions made by the company not only affect the company alone, it affects employees, the economy, the customers, and the environment. These decisions and methods are important when considering long-term business operations. The decision making process for the situation had many factors involved. The most noticeable factor was the cost of replacing the lower quality whistles with a product that is up to the company’s standard and isn’t potentially hazardous. There was multiple ways of looking the problem; ignoring it, saving the company money and hoping there was not issues with the product, or there was the option to replace the product with something the company could be proud of, a product that had no hazards for use by children, and doing what was appropriate ethically for the situation. Social responsibility played a major part in the decision to use alternative 2 and replace the order with whistles that didn’t have high amounts of lead. The choice to do what is best for the customer, environment, and the kids of the schools outweighed the option to save the company time and money.

About A Structural Unemployment - Free Essay Example

Sample details Pages: 3 Words: 790 Downloads: 8 Date added: 2019/05/31 Category Society Essay Level High school Tags: Unemployment Essay Did you like this example? Structural unemployment can be defined as unemployment that exists as a result of rigidities in the labor market, such as a fall in the demand for a particular type of labor. There are three common causes of structural unemployment. First, new technologies push certain types of labor into irrelevancy. Many of the major technological advancements of the 21st century have centered around automation, which by its very nature reduces the need for human labor. Additionally, another prevalent occurrence that results in structural unemployment is the presence of lower-cost labor in developing nations. The principal priority of firms is to maximize profits, and this often includes shipping labor sometimes entire factories to foreign countries where the labor market is significantly cheaper. When these jobs leave, it usually means that they’re leaving for good. Finally, changes in consumer taste may lead to a decreased demand for certain types of labor. For example, in 1979, a nuclear power plant in Pennsylvania had a partial meltdown, and it was considered to be the most significant nuclear accident in U.S. history. As a result, nuclear power lost its momentum, and jobs in nuclear engineering were scarce for decades. Ultimately, structural unemployment is most likely to occur in the face of technological advancements, the exportation of labor to developing countries, and changing consumer tastes. Don’t waste time! Our writers will create an original "About A Structural Unemployment" essay for you Create order As described above, there are countless circumstances that would be conducive to structural unemployment. For example, Figure 1 below illustrates a scenario in which pharmaceuticals, one of Ireland’s largest exports, has been outsourced to India. Given that the cost of employing labor is higher in more industrialized nations such as Ireland when compared to developing nations like India, labor demand in Ireland will fall. The consequence of this is that there are fewer pharmaceutical workers employed, (Q? to Q?) and wages (W? to W?) fall significantly. From this diagram we can assume (ceteris paribus) that unless these workers manage to find other jobs, there is an increase in unemployment. In order to ensure that unemployed workers can find new work and do not become structurally unemployed, the government can begin preventative initiatives through education and training, which would alleviate the effects of the diagram shown above. This interventionist approach is the best way to go about reducing structural unemployment. It is regarded by economists as the most devastating form of equilibrium unemployment because it results from extensive changes to the structure of the economy itself; and very rarely do economies move backward. Therefore, it is understood that when structural unemployment is present, the labor force will be forced to adapt to the shifting market climate. In order to do this, more radical change is needed than just allowing the free market to regulate itself, and interventionist policies must be implemented. One of the best long term solutions involves an education system in which people are encouraged to be more occupationally flexible. There must be a structural change to solve a structural problem. Evidence suggests that people in developed countries like Ireland will most likely change jobs multiple times throughout the course of their career. Therefore, it is apparent that a well-developed and diverse education system would allow individuals to acquire the necessary skills to adapt to rapid shifts in the market climate. For example, studies comparing the German and American education systems have shown that the German model gives students the potential for more occupational mobility due to their use of â€Å"tracking† and placing them in a level of education that best suits their needs and talents, while giving them a broad understanding of the general field they will be entering, so students who are bound for more of a vocational education will gain knowledge in various different trades. Models that are adhered to in countries like the United States allow for people to specialize in what interests them a nd pick up a set of particular skills, but it makes the labor force at large more susceptible to falling into structural unemployment as the market develops and changes. Similarly, the next strategy to best improve occupational mobility would also involve a structural change in education and career development: retraining. This would require a spending initiative to promote and facilitate adult retraining programs. Doing so would assist in acquiring the necessary skills to match with available jobs in growing markets. For example, the United States’ Workforce Investment Act of 1998 is a good starting point for the more extensive type of program that would be required to limit widespread structural unemployment. The program is designed to link workers to job opportunities in their communities after providing support and retraining services in order to achieve meaningful employment. Ultimately, the use of education and retraining can be highly effective at reducing structural unemployment.