2. What does it mean if a micrograph is "false-colored?"

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 thought to have caused the mass extinction at the end of the cretaceous period?

Contrast how pollination is different among gymnosperms and angiosperms.