Questions are to be answered in full sentences. Answers should be approximately 125 words each or two to three paragraphs each. You may use your text book, Mastering Biology or other outside sources as references, and you must cite your references at the end of each essay. The essay exam is not timed.
1.Compare the embryos of chickens, humans and fish, and describe in detail how pharyngeal arches show a shared evolutionary past?
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2.Explain how reproductive barriers result in the development of different species.
3.Explain what is meant by the statement, evolution does not have a goal.
4.Explain why you would or would not expect evolution to proceed more quickly in a rapidly changing environment. Be sure to address all five agents of evolutionary change in your response.
5.Explain, using the illustrations on page 155 of your text, why penicillin, once a widely used and effective antibiotic, is now no longer effective against penicillin-resistant bacteria.
**copy and paste the question and place the answer up under it please give references â€¦ The TEXTBOOK IS NEEDED FOR NUMBER 5