URGENT PLEASE HURRY

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

The science for classifying and naming organisms is known as

10. in which phase will crossing-over occur? a. mitosis b. metaphase ii c. prophase i d. meiosis ii