Biology

Based on the diagram, the correct answer is: B.Phospholipid bilayer

Here's why:

1.The phospholipid bilayer is the fundamental structure of the cell membrane. It consists of two layers of phospholipids, where:

2.The hydrophilic heads (water-attracting) are oriented toward the outside of the membrane, facing the aqueous environment (extracellular space or cytoplasm).

3.The hydrophobic tails (water-repelling) are oriented toward the interior of the membrane, away from water.

This arrangement forms a stable barrier that separates the inside of the cell from the out...