<span>Cork cells are plant cells on the outer edge of the trunks/limbs of woody plants. The cell wall is made of suberin, which doesn't let gas or water through. In essence, this helps keep the water in and unwanted things (like pathogens) out.
The inside of the cell is usually empty, but may have a few traces of things depending on species. These cells don't replicate and are generally considered to be dead.</span>
Im not sure if this is right or not but i think it might be C.
Hope its right!!!!
Answer:
Variables are parameters that are monitored and controlled or affected by the feedback system
Explanation:
B) It requires energy
D) It involves the help of carrier proteins.