The Living World 8th Edition by George Johnson

تمرين 6

Organisms with longer digestive systems, which help break down difficult to digest food, are usually
A) herbivores.
B) carnivores.
C) omnivores.
D) detritivores.
All of the following are layers of the vertebrate gastrointestinal tract except
A) the peristalsis.
B) the submucosa.
C) the mucosa.
D) the muscularis.