All of the following are associated with intraspecific aggression in non-human animal populations EXCEPT
a. dispersal of a population of animals into new territories.
b. an enhanced probability that the genes of healthy vigorous individuals will be perpetuated.
c. increased flexibility of behavioral adaptations to new environments.
d. rivalry among males for mating opportunities.
e. cultural transmission of the effects of selection.
e. cultural transmission of the effects of selection.
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Marla is getting ready to give birth to her second child and wonders how this labor will compare to the labor she went through when having her first child. If Marla is typical, her labor will be
a. more painful. c. shorter. b. more irregular. d. longer.
We can identify a wide variety of bitter substances because ____
a. we have many different bitter receptors b. we have only one bitter receptor that responds to all bitter substances c. we can combine the activity of the sour and salty receptors d. even Pacinian corpuscles respond to bitter substances