The only source(s) of new genetic variation in any population is/are
a. mutations.
b. genetic drift.
c. founder effect.
d. migration.
e. natural selection.
a
You might also like to view...
If a population is in genetic equilibrium, then p2 + 2pq + q2 = :
A. 0 B. ½ C. 1 D. 10
Many scientists believe that the loss of the megafauna at the end of the Pleistocene was due to overhunting. What factor gives reason to question this hypothesis?
A) The population of humans at the time was far too low to have had such an effect on mammal populations. B) Many birds went extinct around the same time, and there was no evidence that they were hunted. C) There is evidence that Pleistocene people scavenged, rather than hunted, for their meat. D) The megafauna did not go extinct; rather, the changing climate at the time favored smaller variants of these species.
Some researchers link Homo sapiens' increased brain size to a decrease in the size of the __________
a. legs b. braincase c. gastro-intestinal tract d. upper body
Which one of the traits listed below is not used to define the order Primates?
a. A tendency towards erect posture b. An inflexible, specialized limb structure c. Generalized dentition d. Hands and feet with a high degree of prehensility e. Retention of five digits on the hands and feet