In biology, a trait that arose in an ancestor and is passed along to its descendants is referred to as a
a) derived character.
b) taxonomic group
c) molecular clock
d) physical similarity

a farmer sprays insecticide on his crops to kill unwanted insects, most of the insects die, and the chemicals have the effect of damaging the dna of insects that are not killed. which of these has happened?
a) sexual selection among the insects has changed the gene pool
b) genetic equilibrium has been maintained
c) mutations have arisen that may be altered allele frequencies
d) individuals with new genes have immigrated into the population

often, the second part of the scientific name is
a) a description of the trait or habit
b) the same for other members of the same genus
c) capitalized if it derives from a proper name
d) different in different locations

the three-domain system recognizes fundamental differences between two groups of
a) prokaryotes
b) eukaryotes
c) proists
d) multicellular organisims

a polygenic trait can have
a) many possible genotypes, but few possible phenotypes.
b) many possible genotypes, producing many possible phenotypes.
c) fewer phenotypes than most single-gene traits.
d) fewer genotypes than most single-gene traits.

the situation in which allele frequencies in the gene pool of a population remain constant is called
a) evolution
b) genetic drift
c) genetic equilibrium
d) natural selection

which is the first step that occurred in the spectation of the galapagos finches?
a) behavioral isolation
b) ecological isolation
c) ecological competition
d) founders arrived