A sustained directional shift in a population's average characteristics is called:
a. cladogenesis
b. genetic drift
c. anagenesis
d. speciation
c
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The sectorial premolar complex can be used to __________
a. determine the diet of a primate b. determine the age of primate fossils c. differentiate between hominins and apes d. differentiate between the sexes in hominin species
A person who is homozygous recessive at a locus has which of the following?
a. two copies of the recessive allele b. two copies of the dominant allele c. an autosomal trisomy d. a recessive allele on the X chromosome only e. a recessive allele on the Y chromosome only
Trobriand Island children begin playing erotic games around the age of:
a. 4 to 5 years b. 12 to 13 years c. 7 to 8 years d. 10 to 12 years
Scientific theories are open to future challenges
a. True b. False