A bacillus with single flagella at both ends would be classified as
A) monotrichous.
B) amphitrichous.
C) peritrichous.
D) lophotrichous.
Ans: B) amphitrichous.
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Extremely high or low doses of an immunogen may suppress a specific immune response by stimulating the development of
A) specificity. B) memory. C) tolerance. D) class switching.
What vital element missing from the atmosphere affected the type of life cells first formed on Earth?
a. Ammonia b. Carbon dioxide c. Oxygen d. Nitrogen
Which has been associated with aging in humans?
A) an increase in the number of mitochondria B) no change in the sequence of the mitochondrial genome C) a decrease in mitochondrial function D) an increase in mitochondrial function
Synaptic integration means
a. all positive or excitatory stimuli are added together. b. the positive and negative ions neutralize each other. c. excitatory and inhibitory signals are combined in a neuron. d. the adjacent neurons interact so that excitatory and inhibitory stimuli cancel each other out. e. that an interneuron is involved.