The net outcome of predator-prey interactions in the basic Lotka-Volterra models is that: a. the prey population declines and this causes the predator population to also decline.
b. the predator drives its prey to extinction and then goes extinct itself.
c. predator and prey populations eventually converge on equilibrium population sizes that are maintained into infinity.
d. predator and prey populations oscillate, with each predictably increasing and decreasing in response to the other.

12) several teeth were found in an area of flat land covered with trees and plants. the teeth were examined by a paleontologist, and it was determined that the teeth came from a shark. they found many other shark teeth in this area. however, the people who discovered the teeth were puzzled, because there was no source of water near where the fossils were found. what is the paleontologist's best explanation for why the teeth were found in this area? a) sharks used to live on flat land. b) this area was once covered with salt water. c) this area was once covered with freshwater. d) someone buried the shark teeth deep in the ground.