Chapter 25

Biology: Life on Earth with Physiology · 7 exercises

Problem 1

Briefly describe each of the following adaptations, and explain the adaptive significance of each: vertebral column, jaws, limbs, amniotic egg, feathers, placenta.

6 step solution

Problem 2

List the vertebrate groups that have each of the following. a. a skeleton of cartilage b. a two-chambered heart c. amniotic egg d. endothermy e. a four-chambered heart f. a placenta g. lungs supplemented by air sacs

7 step solution

Problem 3

Which chordate features can be found in the human embryo?

5 step solution

Problem 4

Discuss the important features of cartilaginous fishes, rayfinned fishes, coelacanths, and lungfishes.

5 step solution

Problem 5

List the adaptations that distinguish reptiles from amphibians and help reptiles adapt to life in dry terrestrial environments.

6 step solution

Problem 6

List the adaptations of birds that contribute to their ability to fly.

8 step solution

Problem 7

How do mammals differ from birds, and what adaptations do they share?

4 step solution

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