Answer:
I dont know much about plants lol sorry but here is a diagram. hope it helps
Hi you’ve only provided one of the options but I don’t know if this will help. The cell membrane is a Thin flexible barristers that surround all cells. Selectively permeable is some substance to pass across while others cannot. Hopefully that can give you give an idea.
I think to get more oxygen for the lungs. Hope this helped.
They are representatives between the extinction events