8. Which of the following involves a situation in which a density-dependent factor influences a population?
a. Several seasons passed during which rainfall was ample, winters were not severe and
food for snow hares was in good supply.
b. A hurricane severely disrupted a salt marsh and uprooted most of the marsh grass in an
estuary.
c. A forest fire on the north side of a mountain forced the white-tailed deer from the north
side to move into the range of the white-tailed deer on the south side of the mountain,
making food more scarce.
d. After a heavy rain, pesticides that were applied to a cotton crop to control weevils ran off
into a waterway that flows next to a field.
9. On ten acres of native forest there are eight white-tailed deer, seven coyotes, 45 armadillos, and 231 loblolly
pine trees. Which population has the highest density?
a. white-tailed deer
c. armadillos
b. coyotes
d. Toblolly pine trees