McGraw-Hill Online Learning Center Test

McGraw-Hill Online Learning Center Test


1. Review the image and answer the following questions.

What do birds lack that is present in the digestive systems of other animals?

A. large intestine
B. teeth
C. esophagus
D. smooth muscle


2. Where does chemical digestion begin in birds?

A. mouth
B. crop
C. stomach
D. gizzard
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