Think about how your body reacts if you start exercising. How do the nervous, muscular, circulatory, and respiratory systems respond to an increased oxygen demand?

Why do mutations in genes affect traits? o a. genes determine what type of mutagens an organism has. o b. genes produce proteins that cause traits. o c. genes affect how many chromosomes an organism has o d. genes code for carbohydrates that influence traits.

Q: a: in sexually reproducing animals, once fertilization of the egg takes place, the exists as a single cell until cell division begins

What is the similarities and differences between bacteria and eukaryote?