Diffusion does not require the cell to expend atp. therefore, diffusion is considered a type of a) exocytosis. b) phagocytosis. c) passive transport. d) active transport. e) endocytosis.

Which of the following is a cost of urbanization? a-cities can provide a high standard of living. b-cities are hubs of entertainment and education. c-paving over land changes the environment. d-job opportunities are greater in urban centers.

An easy way to calculate the amount of energy available at each level is to what?

What is an endocrine function? (apex) a.esophageal glands release mucus into the esophagus b.salivary glands release saliva into mouth c.swear glands release sweat to the skin d.the pineal gland releases melatonin into the bloodstream