Answer:
Embedded in the lipid bilayer are large proteins, many of which transport ions and water-soluble molecules across the membrane. Some proteins in the plasma membrane form open pores, called membrane channels, which allow the free diffusion of ions into and out of the cell.
Answer:
B
Explanation:
When deforestation takes place, it heats up the atmosphere causing more global warming.
Circadian rhythms ....its just behavior that is repeated over 24 hours
