The most important predator in salt marshes at low tide are:
a. crabs
b. birds.
c. nematodes.
d. marsh snails.
b
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A likely biological basis of major depressive disorder is
A) reuptake pumps for serotonin in the presynaptic neuron membrane that are overactive, depleting serotonin in the synapse. B) absent reuptake pumps for serotonin in the presynaptic neuron membrane. C) reuptake pumps for serotonin in the postsynaptic neuron membrane that do not function adequately. D) reuptake pumps for serotonin in the postsynaptic neuron membrane that are overactive, depleting serotonin in the synapse.
what is EBV-II?
What will be an ideal response?
When blood glucose is low, alpha cells secrete
__________, which calls for glycogen breakdown and glucose release by the liver. Fill in the blank(s) with the appropriate word(s).
Contact inhibition means that
A. cells are able to divide without the presence of stimulatory growth factors. B. when cells come in contact with a neighbor, they stop dividing. C. cells have gained the ability to invade lymphatic and blood vessels. D. cells only divide a certain specified number of times and then quit. E. there are more chromosomes within the nucleus than there should be.