Mammals are diphydonts, which means that they have:
a. teeth that can be replaced throughout their lifetime.
b. two kinds of keratin that form into distinct kinds of hairs.
c. two different types of teeth that perform different functions.
d. two sets of teeth in their lifetime.
d. two sets of teeth in their lifetime.
Mammals are diphydonts, which means that they have two sets of teeth in their lifetime—“baby” teeth that fall out and are replaced by permanent teeth.
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A. tip of the nose B. outer ear C. intervertebral disks of the backbone D. knee cap E. larynx
The most common marine annelids are:
a. polychaetes. b. roundworms. c. earthworms. d. leeches. e. ribbon worms.
Blisters are
A. confined to epidermis B. originate in the dermis C. originate in the subcutaneous layer D. result from a separation of epidermis from dermis E. None of the choices are correct
The ability of glucose to repress the lac operon depends on which effector molecules?
A. cAMP B. allolactose C. starch D. tryptophan E. ADP