C) it regulates what goes in and out of the cell
Usually the membrane is the organelles that acts like a door. They decide what type of nutrients and molecules go into the cell.
Earth's Energy balance describes how the incoming energy from the sun is used and returned to space. If incoming and outgoing energy are in balance, the earth's temperature remains constant. So it’s B
1 Have patience
2 Build other interests
3 Change the way you do things
4Use positive self-talk
Heat energy is absorbed when boiling point comes
Only pertain to exchanges and interactions that occur within the atmosphere.
