Which of the following is NOT a feature that is

found exclusively among all vertebrates?
a. notochord
b. pharyngeal gill slits
c. four legs
d. post-anal tail
e. dorsal nerve cord


Answer: c

Biology & Microbiology

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The MMR vaccine is used to protect against

A. mononucleosis, mange, rubeola. B. measles, mange, rubeola. C. mononucleosis, mumps, rubella. D. measles, mumps, rubella.

Biology & Microbiology

In order to understand the driving force of ATP synthase in chloroplasts, researchers broke open chloroplasts, isolated

the thylakoid membrane and measured ATP synthesis under different light conditions. What were the results of this experiment?

a. ATP production occurred only in light, suggesting that the light is directly responsible for the activation of ATP synthase. b. ATP production occurred only in light, suggesting that the light is indirectly responsible for the activation of ATP synthase. c. ATP production occurred only in dark, suggesting that the light directly inhibits ATP synthase. d. ATP production occurred only in dark, suggesting that the photons of light act as allosteric (non-competitive) inhibitors of ATP synthase. e. ATP production occurred only in dark, suggesting that the light is indirectly responsible for the activation of ATP synthase.

Biology & Microbiology

Rhizarians play what important role in the environment?

a. nitrogen fixation in soils b. bioremediation after chemical accidents c. sequestration of carbon in their calcium carbonate shells d. decomposition

Biology & Microbiology

Mitosis is to a somate as meiosis is to a(n) _____________________

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

Biology & Microbiology