Please help question #13

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

Differentiation of cells changes the nucleic information. true false

In general, characteristics that an organism survive and reproduce become more common over time. what mechanism of evolution causes this?