Rewrite this sentence: “As an organism develops, its cells take on different structures by expressing different combinations of genes.”

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

The shift of a vehicle's weight around its center of gravity is known as

Which of the following was not a major animal on land during the carboniferous period? amphibians insects both a and b none of the above