The human embryo possesses __________ by the

end of week four.
a. pharyngeal arches
b. a notochord
c. a forming neural tube
d. somites
e. all of these


Answer: e

Biology & Microbiology

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The 3 types of horizontal gene flow that occur in bacteria are __________, __________, and

__________. Fill in the blank(s) with the appropriate word(s).

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Tunde is abnormally slender. Which of the following conditions is she more likely to have compared to an obese person, given the information in this chapter?

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Wow! That medicine really tasted bitter! In which lobe of the cerebrum did you consciously think about that?

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