Beta receptors: O are cholinergic.
O bind acetylcholine.
O bind norepinephrine.
O bind the toxin muscarine.

p

explanation:

c

explanation:

name and explain one of the event that occurs during meiosis that increases the variation in offspring even more than simple reproduction?

the answer is true when observing or determining population size, a direct observation is use, in which each organism is counted in a population or in an area. one benefit of this measure is that you get the exact population count but it will take a long time to  determine  the  size  of a  population.