Which is a function of the cell membrane? 1.performs photosynthesis
2.controls what enters and leaves the cell
3.produces proteins
4. provides energy to the cell

2

Explanation:

A cell membrane is a thin, flexible barrier that surrounds all cells; regulates what enters and leaves the cell

humans can cause extinction of a species through overharvesting, pollution, habitat destruction, introduction of invasive species (such as new predators and food competitors), overhunting, and other influences. explosive, unsustainable human population growth is an essential cause of the extinction crisis.

explanation:

i didn't have the answer choices , but i tried my best.