The earliest mammals resembled small:a
dogs.
b. koalas.
c. kangaroos.
d. monkeys.
e. shrews.
E
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During long-term potentiation the release of the neurotransmitter glutamate triggers the opening of sodium and calcium channels in the postsynaptic cell, increasing ion flow. What type of channel is responsible for this increase in ion flow?
A. voltage-gated ion channel B. ligand-gated ion channel C. ttretch-gated ion channel D. pump protein
Which immunoglobulin is able to pass the placenta to protect the fetus from pathogens?
a. IgG b. IgA c. IgD d. IgM e. IgE
the figure above to answer questions 12–14
E 12. A body plan lacking a body cavity is indicated by a. A. b. B. c. C. d. A and B. e. none of these.
Auxins in plants are known to affect which of the following processes?
I) gravitropism of shoots II) maintenance of seed dormancy III) phototropism of shoots IV) inhibition of lateral buds V) apical dominance A) only I and II B) only I, III and V C) only I, III, IV and V D) only II, III, IV and V