Question

a cell membrane is...
all of these answers are correct.
a protective barrier that wraps around cells and helps control what moves in and out.
the powerhouse of a cell.
not semipermeable.

Explanation:

• The cell membrane is a protective barrier around the cell. It controls the movement of substances in and out of the cell (selective permeability or semi - permeability).
• The powerhouse of the cell is the mitochondria, not the cell membrane.
• The cell membrane is semi - permeable.

Answer:

A. all of these answers are correct.