Question

Carlos is studying a cell under a microscope. He observes the structure

that allows things in and out of the cell. What is this called? *
Cell membrane
Cytoplasm
Chlorplasts
Nucleus

Answer 1

Cell membrane.

The cell membrane encompasses the whole cell. There are transport proteins on the cell membrane which allow things to enter and exit the cell. Some things can pass through the membrane without the need for transport proteins.

Answer 2

Cell membrane is the answer