Natural selection leads organisms to become adapted to their
environment over time. Using concept of natural selection, explain how
the giraffe most likely came to have such a long neck.

Nucleic acid certain protein cell membranes certain carbohydrates

Which statement is the best summary of the model? a-a series of aerobic and anaerobic reactions take place in cells b- the sun's energy moves through trophic levels in a food chain c-light energy is converted into stored chemical energy plants.d- food molecules are broken down in the cells if living things.

Which organ controls breathing? lungs alveoli heart diaphragm