Question

select the part whose main job is to control which substances enter and leave the cell. ribosome vacuole cell membrane chloroplast

Explanation:

The cell membrane is a selectively - permeable barrier. It regulates the movement of substances in and out of the cell. Ribosomes are for protein synthesis, vacuoles store substances and help with cell turgor, and chloroplasts are for photosynthesis.

Answer:

cell membrane