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 why penicillin, once a widely used and
effective antibiotic, is now no longer effective against penicillin-resistant
bacteria.
6. We all know that bacteria are capable of causing serious
illnesses. Research has now shown that bacteria are helpful in many more ways
than had previously been known. How is your life influenced by helpful
bacteria?
7. Present your
view of the early conditions on earth that might have affected the traits of
organisms living in that environment and how life may have formed. Explain how
extremophiles represent examples of those organisms.
8. Viruses, prions and viroids are non-living organisms that
require a living cellular host in order to reproduce. They cannot do it on
their own. These parasites may be just a string of RNA, as in a viroid, or a
length of DNA enclosed in a protein shell, as in a virus.Is it possible that these parasites
may be links to the earliest days of the beginning of life on this planet?
Post your primary
response and support your statements with references.
Your primary post should be at least 125
words or so. Be sure to cite your
references in American Psychological Association (APA) style in-text and
include the full APA style reference information at the end of the document.
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