McGraw-Hill Online Learning Center Test

McGraw-Hill Online Learning Center Test


1. Review the image and answer the following questions.

What is the advantage in having a jaw over being jawless?

A. There is a wider variety of food-gathering methods the jawed fish could employ.
B. Biting teeth are possible.
C. They made predation possible.
D. All of these are correct.


2. In what group did jaws first evolve?

A. lungfishes
B. ostracoderms
C. acanthodians and placoderms
D. agnanthans
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