Imagine that a chromosome was compared to a novel. what could a gene be compared to?

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

To be or not to be that is da question

Which of the following explains why a tree is often used as a model to represent the principle of common descent