What are flagella?
A. false feet
B. skinny tails
C. hairlike projections
D. temporary extensions

What does it mean for a cell membrane to be selectively permable

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 number of phosphates in an atp molecule