B. It allows some molecules to enter the cell and blocks entry to others.
A plant retains about 23% of energy from the sun.
I Hope This Helps :)
D. 3 this is because it is force over mass and 144/48 is equal to 3
Answer:
I believe the answer is
B. The biotic and abotic items in the ecosystem.
OR
A. All of the different population of species in one geographic area.
Explanation:
Biological community consisting of living organisms in different locations. For example, a forest trees and undergrowth plants, inhabited by animals and rooted in soil containing bacteria and fungi, constitutes a biological community.
Answer:
Bacteria turn nitrogen gas into a form that living things can use