It has been estimated that 99% of the intestinal bacteria are

A. facultative anaerobes.
B. obligate aerobes.
C. facultative aerobes.
D. obligate anaerobes.


D

Biology & Microbiology

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Which one of the following types of culture media is selective and differential?

A) blood agar B) MacConkey agar C) phenylethyl alcohol agar D) Thayer-Martin agar

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Human DNA can be replicated quickly because it has many

A) replication forks. B) genes. C) chromosomes. D) histones.

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When you feel threatened, the neurotransmitter norepinephrine is released from the adrenal gland in response to

stimuli by ____ neurons.

a. somatic b. sensory c. sympathetic d. motor e. parasympathetic

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The above figure of a young cuckoo pushing a

resident age out of the nest demonstrates a. imprinting behavior. b. displaying instinctive behavior. c. feeding a social parasite. d. a learned behavior. e. all of these

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