If you are relating the levels of organizations the human body to the levels of organization of a city, what would relate cells 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

In some plants, pointed leaves (p) are dominant over rounded leaves (p). a plant with a genotype of pp

Variety of living organisms; includes genetic, species, and ecological types.