What other structures are found in plants that allow for the exchange of gases? (other than the stomata)

Which is an example of a population?

How are mutations continually being generated in a population (what are some of the causes of mutatuions? ) explain

Need an answer asap 45 points and brainlest to the first person to answer why do scientific theories, such as biological and chemical evolution, represent the strongest explanation of the changes observed in the fossil record. must be in sentence form how can scientific theories on evolution and the fossil record change over time? must be in sentence form