Which factor is most critical for organisms to facilitate social behavior?
a. There must be a large population.
b. All present must be of the same species.
c. All present must have the same genetic imprinting.
d. There must be a mechanism for communication.
e. No outsiders can be allowed to enter the group.
d
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The multiple effects of a single gene on the phenotype of an organism is called _______
A. epistasis B. penetrance C. expressivity D. overdominance E. pleiotropy
The specific discipline that linked Mendel's and Darwin's work was ____
a. population biology b. paleontology
c. population genetics d. biogeography e. modern synthesis
Which layer of the digestive tract is in direct contact with digested food?
a. mucosa b. circular muscle c. longitudinal muscle d. submucosa e. serosa
Evolution is a process which is moving towards a defined goal.
a. true b. false