In a community, biodiversity can be measured by

Which plant has a visible leaf modification that will it conserve water in extremely dry environments?

How can you keep track of variables in a science experiment?

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