Toxoid vaccines, such as the vaccines against diphtheria and tetanus, elicit a(n)
A) TC cell response.
B) immune complex.
C) dendritic cell proliferation.
D) antibody response against these bacterial toxins.
E) antibody response against gram-positive bacteria.
D
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An excitatory postsynaptic potential
a. is only one of several types of graded potential. b. has a hyperpolarizing effect. c. will drive the membrane away from its potential. d. is summed with an inhibitory postsynaptic potential at the input zone of a neuron in a process known as synaptic integration. e. is none of these.
Who discovered Homo habilis?
A. Louis Leakey B. Mary Leakey C. Richard Leakey D. Andrew Hill E. Don Johanson
Swimming pool granuloma is caused by
A. Mycobacterium avium complex (MAC). B. Mycobacterium kansasii. C. Mycobacterium scrofulaceum. D. Mycobacterium fortuitum complex. E. Mycobacterium marinum.
Regarding the evolution of whales, evidence supports that __________ are more closely related to ___________ than to _____________.
Fill in the blank(s) with the appropriate word(s).