some what lack respiratory systems?
Smoking respiratory systems deuterostomes cigarettes alpacas hawks barnacles pigs
A B C D E F G H
All echinoderms are deuterostomes .
some deuterostomes lack respiratory systems
some what lack respiratory systems? (A) Smoking (B) respiratory systems (C) deuterostomes (D) cigarettes (E) alpacas (F) hawks (G) barnacles (H) pigs