If carbon dioxide is needed for photosynthesis and water is plentiful, which of the following is likely to occur? a. the stomata will open until too much water is lost. b. the stomata will close until enough water is lost. c. water pressure is going to decrease in the guard cells. d. additional water will be gained and the plant cells will become rigid.

Epinephrine is a hormone released from the adrenal gland of the body, most often in a stressful situation. it is known as the "fight-or-flight" hormone. one way that it causes a response in the body is to activate receptors on muscle cells. where are these cellular receptors located? a. on the cell membrane b. in the nucleus c. on the cell wall d. around the mitochondria

What is the difference between how ionic and covalent bonds form

What is a group of organisms that are closely related and share similar characteristics