Macy always thought there were only a few hair colors: blond, brown, and black. however, when she actually began looking around, she saw varying shades of these hair colors. what is a possible reason for so many different hair colors?

Sweating and breathing is an example of differentiation specialization maintaining homeostasis metabolism

Which of the following is not a possible effectof increasimg carbon dioxide levels in the atmosphere ?

One function of the immune system is to attack the foreign cells to protect the body. in organ translate , the body recongnizes that the new organ is made of foreign cells. wha kind of medicine would you give a patient to increase the chances of transplate success