Answers:
a. A: Lipid B: Phospholipid
b: i. (on the diagram) Junction between 3 tails and head
ii. Glycerol and fatty acids
c. (on diagram) label head with phosphate
d. i. Molecule B
ii. Phosphate is a polar molecule which dissolves in water,the phospholipid head is hydrophilic.
e. A: Energy storage
B: Structure of plasma membrane