Opportunists or opportunistic pathogens
A. are usually saprophytes.
B. take advantage of special circumstances.
C. are usually mutualistic.
D. always cause disease.
B
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The rapid increase in adaptive immunity after a second antigen exposure is called
A) immune memory. B) specificity. C) tolerance. D) immune memory, specificity, or tolerance.
At the start of translation the initiator tRNA is base paired with the start codon at ____ in the
ribosome.
a. the A site (aminoacyl site) b. first the A site (aminoacyl site) and then the E site (exit site) c. the P site (peptidyl site) d. first the A site (aminoacyl site) and then the P site (peptidyl site) e. the E site (exit site)
Gene flow has a greater effect on large populations than on small populations
a. true b. false
EPSP is a process of activating postsynaptic neuron by (i) ________ of the membrane that is accompanied by (ii) ___ influx.
a) (i) depolarization, (ii) Na+ b) (i) hyperpolarization, (ii) Na+ c) (i) depolarization, (ii) Cl- d) (i) hyperpolarization, (ii) Cl-