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 between populations.

1. Increased predators only affect population size, not genetic exchange between groups.
2. A volcanic eruption reducing a population is genetic drift, not gene flow.
3. Bird droppings with seeds from another location introduce new plant individuals (and their genes) to a new population, enabling gene flow.
4. Spraying toxins only impacts the targeted mosquito population, no genetic transfer between populations occurs.

Answer:

bird droppings that contain seeds from a different location