Why is it important that the cell membrane is selectively permeable? Check all that apply. A) It prevents water from leaving the cell.
B) It allows nutrients to enter the cell.
C) It provides a barrier against disease-causing agents.
D) It enables cells to interact with their environment.

B, C and, D

It allows nutrients to enter the cell.

It provides a barrier against disease-causing agents.

It enables cells to interact with their environment.

any abiotic or biotic factor in an ecosystem that causes a population's size to slow or decrease is a limiting factor.

the solute can move "downhill," from regions of higher to lower concentration, relying on the specificity of the protein carrier to pass through the membrane. this process is called passive transport or facilitated diffusion, and does not require energy.