B.4B 5. When the concentration of molecules on both sides of a membrane is the same, the molecules will -- *
A. Move across the membrane to the outside of the cell.
B. Stop moving across the membrane.
C. Move across the membrane in both directions.
D. Move across the membrane to the inside of the cell.

What feature of cell theory is best demonstrated in the image

Ablastocyst is a group of cells that forms after a human egg is fertilized. the blastocyst consists of two types of cells. some of these cells will become the placenta. what do the other cells develop into?

Which best explains how a heat pump can heat a room? cold air from the house is moved through pipes, where it absorbs thermal energy. warm air from outside is pushed into the house to replace the cold air. combustion warms the air when chemical energy is transferred to thermal energy. fuel is used to move a piston, which pushes warm air into the house.