Stimulants include

a. nicotine.
b. amphetamines.
c. caffeine.
d. cocaine.
e. all of these.


E

Biology & Microbiology

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Which of the following areas of the respiratory tract is lined with a single layer of epithelial cells?

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The _____ is analogous to the female's ovary.

A. vas deferens B. corpus spongiosum C. meatus D. testis

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Annelids have ___.

a) a coelom b) a pseudocoelom c) no coleom d) none of the above

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Proteins associated with DNA in the nucleus of eukaryotic cells are called ________.

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

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