What differ strongly in appearance and are barrel shaped?\nOptions:\n- (A) bears\n- (B) barnacles\n- (C) abdomens\n- (D) oxen\n- (E) Leptospirosis\n- (F) cacti\n- (G) burrs\n- (H) tunicates
Let’s work this out in a step by step way to be sure we have the right answer.
(H)
Adult tunicates are barrel-shaped.

Tunicates differ strongly in appearance between the adult and larva.

Tunicates differ strongly in appearance and are barrel shaped.

.

Therefore, the answer is (H)