What differ strongly in appearance and are barrel shaped?
Options:
- (A) bears
- (B) barnacles
- (C) abdomens
- (D) oxen
- (E) Leptospirosis
- (F) cacti
- (G) burrs
- (H) tunicates Let's solve this problem gradually.
Adult tunicates are barrel-shaped. Tunicates differ strongly in appearance between the adult and larva. Tunicates differ strongly in appearance and are barrel shaped. So the final answer is (H).