The cell membrane helps to transport ions, nutrients, and waste.
So... I have'nt done this since November, but hope this helps.
1. A
2. A or B (most likely A)
3.B
4.B
Answer:
Explanation:well 1 mean its a solid that already formed and like so it means that its done like u cant do anything else with the experiment
The have tube feet and and they have no organs or eyes
