You are helping to prepare images for a textbook when you see a caption saying "first land vertebrates," so you look for pictures of
A) amphibians.
B) reptiles.
C) tortoises.
D) lampreys.
E) lungfish.

Question

You are helping to prepare images for a textbook when you see a caption saying "first land vertebrates," so you look for pictures of 
A) amphibians.
B) reptiles.
C) tortoises.
D) lampreys.
E) lungfish.

Quizplus · Accepted Answer

One sign that amphibians were early land animals is the fact that they must return to the water to breed.

You Are Helping to Prepare Images for a Textbook When