Panthers and pumas preyon a type of deer in a region. the deer feed on vegetation in the region. what outcome could occur if the panthers and puma are killed by humans? a. the deerpopulation will decrease, allowing thevegetation to become overgrown. b. the deer population will increase, and will strip the region of vegatation c. the deer population will be stabilized by local vegatation. d. the deer population will cycle between high and low numbers until a new predator moves into the region

Which of the following statements is true about the relationship between genetic variation and natural selection? a. genetic variation must be present in a population before natural selection can act on it. b. genetic variation arises in a population as a result of natural selection. c. natural selection can act on a population whether there is genetic variation within the population or not. d. after natural selection acts on a population, the amount of genetic variation in the population always increases.