The "BCM theory" hypothesizes that LTP is the result of presynaptic activation and (A)_________, whereas LTD is the result of presynaptic activation and (B)_______.
a. (A) weak postsynaptic activity, (B) strong postsynaptic activity
b. (A) strong postsynaptic activity, (B) no postsynaptic activity
c. (A) no postsynaptic activity, (B) weak postsynaptic activity
d. (A) strong postsynaptic activity, (B) weak postsynaptic activity
Answer: d. (A) strong postsynaptic activity, (B) weak postsynaptic activity
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The flexibility of the polypeptide backbone:
A. allows maximum rotation of the unbranched R groups. B. allows resonance between trans and cis configurations. C. is limited by the resonance between the alpha carbon and carboxyl oxygen. D. is limited by resonance between the carboxyl oxygen and amide nitrogen. E. is determined by balance between polar and nonpolar R groups.
Epstein-Barr virus may become latent in
A. red blood cells. B. T cells. C. nerve cells. D. B cells.
Obligate mutualisms: Lichens
What will be an ideal response?
How might the timing of when fruit falls from a tree be important in sympatric speciation?
A. Apple fruit drops earlier than hawthorn fruit to reduce the interaction of the fly species in time. B. Apple fruit falling earlier is a vicariant event. C. Fruit ripening is important for increased reproductive output. D. Apple fruits fall at the same time as hawthorn fruits, thereby being sympatric