CER (claim, evidence, reasoning) Endosymbiosis

Here's one way to follow the scientific method. place the missing steps in the correct position in the process.

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 identity of the planets?