16 Jun BIO 126 Unit 2 take home essays Question
Question
Name
Unit 2 Take Home Essays
Date
1. What are chemo heterotrophs and how do they obtain energy? Name and describe three other ways organisms obtain energy. Why do you think so many different ways of obtaining energy evolved?
2. Give examples of organisms that are prokaryotes and eukaryotes. What “entity-organism” does not fit in either category? Describe three main differences between prokaryotes and eukaryotes. What supports the idea that prokaryotes were involved in the evolution and eukaryotes by means of endosymbiosis?
3. A recent revival in the antievolutionary “intelligent design” argument holds that biochemical pathways are too complex to have evolved, because all intermediate steps are a given pathway must be present to produce the final product. Critique this argument. How could you use the diversity of metabolic pathways that produce the same or similar products to support your case?
4. Scientific evidence indicates that the CO2 added to the air by burning of wood and fossil fuels is contributing to global warming. What is global warming? Why is this process so dangerous to the world we live in? Tropical rain forests are estimated to be responsible for approximately 20% of global photosynthesis, yet the consumption of large amounts of CO2 by living trees is thought to make little or not net contribution of reduction of global warming. Why might this be?
1. You are researching function of a gene. How can you tell if it is an oncogene or tumor suppressor?
3. Discuss the ways a proto-oncogene can become an oncogene and promote cancer. (200-300 words)
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