Fact 1: Echinoderms lack respiratory and excretory systems. Fact 2: All echinoderms are deuterostomes . Given the two facts above, some what lack respiratory systems?
Choices:
A). Smoking.
B). respiratory systems.
C). deuterostomes.
D). cigarettes.
E). alpacas.
F). hawks.
G). barnacles.
H). pigs.
Answer:
C).