M7A2: ESSAY QUIZ (200 words)1.Compare the embryos of chickens, humans and fish, and describe in detail how pharyngeal arches show a shared evolutionary past?. 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 157 of your text, why penicillin, once a widely used and effective antibiotic, is now no longer effective against penicillin-resistant bacteria.
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