Active transport is the movement of ions or molecules across a cell membrane into a region of higher concentration, assisted by enzymes and requiring energy.
Answer:
it controls the heartbeat and movement of food
!
Explanation:
Potential unemployment because that would mean there would be people not getting money + not sErving their part in the community
The answer would be the *thermosphere
They share lack of back bone, use tube feet to move, and I’m not sure about the open circulatory system because mollusks that fall into cephalopod category have closed ones but all others have open as well as echinoderms