Ecdysis is:

A. development of the ectoderm layer in the gastrula
B. development of the epidermis from the ectoderm
C. disintegration of the ectoderm
D. molting
E. the feeding tentacles of the Ecdysozoa


D. molting

Biology & Microbiology

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Lipids are the only class of macromolecules that contain:  

A.  amino acids. B.  nucleotides. C.  fatty acids. D.  phosphate groups. E.  monosaccharides.

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The ___________ causes vasocongestion in the penis; the __________ causes emission of semen and the _______ causes expulsion of the semen.

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

Biology & Microbiology

When fat enters the duodenum, which hormone is stimulated to be released?

a. amylase b. secretin c. gastrin d. cholecystokinin

Biology & Microbiology

All of the following represent anchoring junctions EXCEPT

A. tight junctions. B. focal adhesions. C. desmosomes. D. adherens junctions. E. hemidesmosomes.

Biology & Microbiology