In prairies, the presence of plants in the onion family may discourage herbivores within the prairie. This is an example of .

Alaska and northern canada have a diet rich in vitamin d and their skin color is darker than predicted on the basis of iv intensity at their latitude. explain the observation:

Which animal group is the largest and contains more species from all the other living groups combined? is it mammals or

Give an example of a trait that is controlled by more than one gene.