The most common and physiologically important auxin is:

a. indoleacetic acid.
b. indolebutyric acid.
c. naphthaleneacetic acid.
d. 2,4-D.
e. 2,4,5-T.


a

Biology & Microbiology

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The cytoplasmic proteins of Halobacterium are

A) highly acidic. B) highly basic. C) generally neutral. D) variable, depending on the species.

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Which is NOT a correct association of brain structures and functions?

Select one: a. midbrain—reflex centers for visual, auditory, and tactile responses b. cerebellum—coordinates smooth and coordinated motions c. cerebrum—higher thought processes, including learning, memory, and speech d. pons—regulates breathing rate e. thalamus—regulates heartbeat and blood pressure

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From a sociobiological perspective, altruism is a behavior that

A) does not have a genetic basis. B) can potentially enhance the altruist's fitness. C) will always be selected against. D) occurs only in the social insects.

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Intervertebral discs are absent between these vertebrae.

What will be an ideal response?

Biology & Microbiology