What lacks respiratory and excretory systems?
the Sun insects starfish barnacles ferns water Conifers humans
A B C D E F G H
Echinoderms are represented by the starfish.
Starfish lack respiratory and excretory systems.
What lacks respiratory and excretory systems? (A) the Sun (B) insects (C) starfish (D) barnacles (E) ferns (F) water (G) Conifers (H) humans