How are viruses and bacteria different?

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

How are mutations continually being generated in a population (what are some of the causes of mutatuions? ) explain

Isotopes of the same element have differ in their