1.When comparing individuals of a population, a scientists finds a trait (A) that is shared by most members of a population and another trait (B) that is present in only a few individuals. How could this BEST be explained using descent with modification by natural selection?
A.
Trait A evolved earlier in time and was not favored by selection.
B.
Trait A evolved earlier in time and was favored by selection.
C.
Trait A evolved in more locations and was not favored by selection.
D.
Trait A evolved in more locations and was favored by selection.
2.Populations are evolving if
A.
the Hardy-Weinberg equation equals 1.
B.
the Hardy-Weinberg equation equals 0.
C.
p + q changes between generations.
D.
p + q remains the same between generations.
3.S3x ual reproduction provides an advantage to organisms because it increases the
A.
size of the genome of a species.
B.
genetic variability in a population.
C.
fitness of individual alleles of a gene.
D.
number of mutations during cell division.
4.Two parents, who are thought to be different species, mate and produce viable hybrid offspring. When two of these hybrids mate, their offspring are not viable. What is the BEST interpretation of this data?
A.
The original parents are the same species because they can breed together.
B.
The original parents are the same species because they can breed together and produce viable offspring.
C.
The original parents are not the same species because they produce hybrids that impair the species’ development or survival in its environment.
D.
The original parents are not the same species because they produce hybrids that can have reduced viability and fertility when they mate.
5.Adaptive radiation is when
A.
a species develops a new trait.
B.
several species move to a new location.
C.
the number of species in an area rapidly increases in number.
D.
the number of species in an area rapidly decreases in number.
6.Where on a phylogeny are ancestral organisms for two groups found?
A.
at the end of the rightmost branch
B.
at the end of the leftmost branch
C.
on the nodes between the two groups
D.
as a perpendicular line crossing a branch
7.S3 xu al selection is BEST described as favoring traits that increase the
A.
viability of offspring.
B.
number of gametes produced.
C.
likelihood of attracting a mate.
D.
ability to protect a claimed territory.