McGraw-Hill Online Learning Center Test

McGraw-Hill Online Learning Center Test


1. Review the image and answer the following questions.

Of what advantage is the evolution of one-way movement through the digestive tract?

A. It conserves energy.
B. An organism can eat constantly.
C. Different regions of the digestive system can become specialized for different functions.
D. Organisms can become larger.


2. What part of the digestive tracts shown here functions to grind food?

A. intestine
B. crop
C. cloaca
D. gizzard
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