A species of cattail inhabits both deep and shallow water in the absence of a competitor but only shallow water in the presence of it. This is an example of
A) a realized niche.
B) a fundamental niche.
C) carrying capacity.
D) coevolution.
A
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In the illustration below, would the sodium-potassium pump be categorized as a uniporter, symporter, or antiporter?
a. uniporter
b. symporter
c. antiporter
d. none of these
What carries the signal between a neuron sending a message and the neuron receiving it?
a. threshold value b. action potential c. neurotransmitter d. neurohormone e. resting potential
Human chorionic gonadotropin stimulates the corpus luteum to secrete
a. FSH. b. LH. c. testosterone. d. progesterone. e. estrogen and progesterone.
Immune therapy research with potential to work in alleviating both organ rejection and autoimmune disease involves:
A) antibodies. B) regulatory T cells. C) cytotoxic T cell action. D) vaccines.