During the mitotic phase called ______, chromosomes condense, the nuclear envelope disappears, spindle fibers grow, and centrioles migrate to the poles of cell.
Fill in the blank(s) with the appropriate word(s).
prophase
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Synaptic integration means that
a. positive or excitatory stimuli produce an excitatory postsynaptic potential. b. the positive and negative ions neutralize each other. c. excitatory and inhibitory signals are summed in a receiving neuron. d. the adjacent neurons interact so that excitatory and inhibitory stimuli cancel each other out. e. all of these occur.
In what way(s) is the science of biology influencing and changing our culture?
A) by helping us understand the relevance of evolution to human health B) by revealing how mutations in genes can lead to disease C) by providing new tools for forensic investigations D) all of the above
In humans, if nondisjunction led to an individual with a genotype of XO, that person would
A. be male because each cell has only one X chromosome. B. not survive. C. be female because each cell lacks a Y chromosome. D. display both male and female characteristics.
What passes through the digestive tract as fiber or roughage?
A. maltose B. glucose C. cellulose D. glycogen E. starch