The chemotherapy drug taxol inhibits the breakdown of microtubules. A cell treated with taxol would become stuck right after which phase?
A. metaphase
B. anaphase
C. cytokinesis
D. telophase
E. prophase
A. metaphase
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Which of the following is crucial to activation of the adaptive immune response?
A) memory cells B) presentation of MHC (major histocompatibility complex)-antigen complex on a cell surface C) somatic hypermutation D) phagocytosis of antibody-antigen complex by macrophages in the blood (the humoral response)
At an inhibitory synapse
a. no neurotransmitter is released by the sending cell. b. a neurotransmitter produces changes in the receiving cell that drives the membrane potential away from threshold. c. no neurotransmitter can bind to the receiving cell. d. a neurotransmitter produces changes in the receiving cell that drives the membrane potential closer to threshold. e. a neurotransmitter restores the resting potential.
In populations of the greater prairie chicken in Illinois, genetic diversity was lost through
A) mutation and restored by natural selection. B) genetic drift and restored by natural selection. C) gene flow and restored by mutation. D) genetic drift and restored by gene flow.
Which characteristic is more indicative of bulimia than anorexia nervosa?
Select one: a. Rigid, disciplined dieting b. Feeling a sense of power because of strict discipline and self-denial c. Fluctuating weight d. Lack of menstruation