it separates the inside of the cell from the environment outside and it controls substances moving in and out of the cell (selectively permeable)
They lay eggs because they don't have the genetics or things in their body to give birth.
Answer:
I think B because white blood cells fight off bacteria and stuff. I hope this is right for you! if not I am sorry! Have a great holiday.
<span>Rana sylvatica.
Hope this helps!
-Payshence xoxo</span>