Any factor that changes the shape of an enzyme can affect the enzyme's activity. Which of the following two factors affect an enzyme's operation the most?
OA. blood glucose level and pH
OB. amount of light and temperature
OC. amount of light and pressure
OD. temperature and pH

chordata is the answer

answer; both surfaces of the membrane are nonpermeable

this is more of a statement than a question. is there answers to go along with this, or is it opinion based?

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.