Endocrine and exocrine glands are derived from what type of tissue?

a. muscle
b. nerve
c. endocrine
d. epithelial
e. connective


ANSWER: d

Biology & Microbiology

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Studies of a soybean plant (Glycine max) and the bacterium Bradyrhizobium japonicum have shown that the tip of a

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a. a flavonoid released by soybean roots b. nod gene products produced by soybean roots c. nod gene products produced by the bacterium d. nitrogen fixation by the bacterium e. a flavonoid produced by the bacterium

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A phenomenon in which sensations become less noticeable with prolonged exposure is called

A. gradient adaptation. B. an action potential. C. a graded potential. D. radiating adaptation. E. sensory adaptation.

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The immunoglobulin class that is the only one capable of crossing the placenta is

A. IgA. B. IgE. C. IgM. D. IgG. E. IgD.

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If you were asked to separate the reptiles from birds on the chordate family tree, which characteristic would you use?

1.flight 2.nurse young 3.endothermic 4.teeth

Biology & Microbiology