The hominins of the Middle and Late Pliocene exhibited all of the following traits EXCEPT:
A. sexual monomorphism.
B. bipedality.
C. thick enameled molars.
D. large molars.
Answer: A
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A balanced polymorphism that is maintained because the advantageous phenotypes only retain their advantage when they are present below a certain frequency is called __________
a. heterosis b. hybrid vigor c. a frequency-dependent balanced polymorphism d. heterozygous advantage
The current world population is around how many billion?
a. 2 b. 4 .5 c. 7 .5 d. 1 0 e. 1 2
Using Mendel's pea plants as an example, describe three ways in which natural selection affects the distribution of traits.
What will be an ideal response?
The first European Upper Paleolithic site where anatomically modern human fossils were discovered was:
a. Atapuerca, Spain. b. Mauer, Germany. c. Petralona, Greece. d. Cro-Magnon, France.