Biology

The correct term is B.bilayer.

The plasma membrane is referred to as a lipid bilayer because it consists of two layers of phospholipids. The hydrophilic (water-attracting) heads of the phospholipids face outward, toward the aqueous environment (both inside and outside the cell), while the hydrophobic (water-repelling) tails face inward, away from water. This arrangement forms the bilayer structure, whi...