Question

ariana garcia apontes practice r9 identify functions of animal cell parts
select the part whose main job is to control which substances enter and leave the cell.
cell membrane
cytoplasm
endoplasmic reticulum
ribosome

Explanation:

To solve this, we analyze the functions of each cell part:

• Cell membrane: Regulates substance entry/exit (selectively permeable).
• Cytoplasm: Holds organelles, site of reactions.
• Endoplasmic reticulum: Synthesizes proteins/lipids.
• Ribosome: Makes proteins.

Only the cell membrane controls substance movement.

Answer:

cell membrane