Altruistic behavior is
a. selfish.
b. sexually directed behavior.
c. self-sacrificing behavior.
d. aggressive behavior.
e. nonreactive, such as freezing at the sign of
danger.
Answer: c
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Which of the following is true regarding any given modal action pattern?
a. usually found in many species b. involves species-specific responses c. cannot be elicited by a stimulus found in the organism's usual environment d. involves movement towards or away from a stimulus
FtsZ, MreB, and CreS proteins regulate the shape and structure of bacterial (prokaryote) cells. These proteins are homologous to the _______ in eukaryotes.
A. DNA processing enzymes B. cytoskeleton C. organelles D. cell wall
By definition, a nerve is
1.a bundle of axons. 2.a single extension of a neuron. 3.the same as a neuron within the central nervous system. 4.a dendrite. 5.a fiber more than 10 inches in length.
__________ behavior can occur without having been learned by experience.
Fill in the blank(s) with the appropriate word(s).