The age structure diagram for rapidly growing populations
a. is in the form of a pyramid.
b. is characterized by a large percentage of the population in the post-reproductive years.
c. has a very broad base showing a large number of young.
d. has about equal distribution between all age groups.
e. is in the form of a pyramid and has a very broad base showing a large number of young.
E
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Cell signaling between two nerve cells is an example of paracrine signaling because:
A. a signaling molecule (neurotransmitter) is released. B. a receptor is activated. C. the cells are in close proximity. D. the responding cell releases more signaling molecule (neurotransmitter).
Which of the following is NOT associated with leaf abscission?
A. development of suberin impregnated cork cells B. cell wall development C. development of a separation layer D. water stress E. deciduous trees
Transmembrane proteins involved in detecting external stimuli and relaying that information to the cell are most likely ________ proteins.
Fill in the blank(s) with the appropriate word(s).
Which of the following structures and functions is not associated with plasma proteins in a mammal?
a. pH buffering b. Oxygen transport c. Osmotic balance d. Clotting agent e. Antibody