Question

what is the answer, please help me out thank you​

Answer 1

Answer:

1. The primary function of the plasma membrane is to protect the cell from its surroundings.

2. For small multicellular organisms, diffusion across the outer membrane is sufficient to meet their oxygen needs.

Explanation:

1. Composed of a phospholipid bilayer with embedded proteins, the plasma membrane is selectively permeable to ions and organic molecules and regulates the movement of substances in and out of cells.

2. Gas exchange by direct diffusion across surface membranes is efficient for organisms less than 1 mm in diameter