Once an egg has been fertilized, what event(s) are crucial for preventing additional sperm from inserting chromosomes into the egg?
A. the acrosomal reaction
B. the cortical reaction
C. the fast block to polyspermy
D. both the acrosomal and cortical reactions
E. both the cortical reaction and fast block to polyspermy
E. both the cortical reaction and fast block to polyspermy
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If a cell of an organism has 46 chromosomes before meiosis, how many chromosomes will exist in each nucleus after meiosis
What will be an ideal response?
True or False: Individuals in a group often exchange favors. This reciprocal interaction provides one explanation for the evolution of altruism
A. true B. false
Which of the following organisms is likely to contain biomembranes?
A. plants B. animals C. prokaryotes D. plants and animals E. All living organisms contain biomembranes.
When the cell is NOT sending signals, the electrical difference between the inside and outside of a neuronal membrane is specifically referred to as the
A. action potential. B. graded potential. C. resting potential. D. membrane potential. E. reversal potential.