C) I and III only just got this question on usa test prep and therefore i'm right
Zit sure has to be B. Pollution
Answer:
Quadrat sampling is a method by which organisms in a certain proportion of the. habitat are counted directly. It is used to estimate population abundance, density, frequency and. distribution. The quadrat position are chosen randomly or they are placed along a transect.
Explanation:
It is referred to as a selective semipermeable membrane because it only allows certain things through, due to the size and shape of whatever is trying to get through.
