In a longitudinal section of a nerve cell, at the presynaptic site you note a variety of vesicles that are anchored to the plasma membrane. The vesicles must be specialized for

A) constitutive secretion.
B) regulated secretion.
C) polarized secretion.
D) zymogen secretion.
E) none of the above


C) polarized secretion.

Biology & Microbiology

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Osmotic pressure is a function of the difference in the concentration of ____ on the two sides of the membrane

Fill in the blank with the appropriate word.

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Before the publication of Charles Darwin's On the Origin of Species, what was the prevailing public consensus regarding species evolution?

A. That species evolved through physical changes that led to success B. That species were permanent and unchanging C. That species were modified over time but did not change into new species D. That species evolved by means of natural selection

Biology & Microbiology

Which part of the leaf stores toxic or unpalatable compounds in order to deter grazing herbivores?

a. cuticle b. stomata c. trichomes d. mesophyll

Biology & Microbiology

___________, or water bears, have a reduced coelom

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

Biology & Microbiology