Question

which of the following examples can cause gene flow between populations?
an increase in predators to a population of zebra
a volcanic eruption that kills half of a population of mice
bird droppings that contain seeds from a different location
a person that sprays a toxin on a group of mosquitoes

Explanation:

Gene flow is the transfer of genetic material from one population to another. Bird droppings with seeds from a different location can introduce new genes to a plant - population in the area where the droppings are deposited. An increase in predators, a volcanic - eruption, and spraying a toxin are examples of factors that can cause natural selection or population reduction, not gene flow.

Answer:

C. bird droppings that contain seeds from a different location