Before an ozone layer formed to reduce radiation, life existed
a. in the air.
c. in oceans and underground.
b. in trees and plants.
d. on land.

Which of the following is an advantage of solar energy?

Explain why phospholipid molecules form a bilayer. (3 marks)

What is the correct answer for the process of water eroding soil? rills, sheet erosion, gullies sheet erosion, rill, gullies gullies, rills, sheet erosion sheet erosion, gullies, rills