30.2-biology

1.

10 points

Amphibians have thin, moist skin and most have four ______.

2.

10 points

Fertilization in most amphibians is __________, and water is needed as a medium for transporting sperm.

3.

10 points

Amphibians are more common in regions that have ______ temperatures all year because they are ectotherms.

4.

10 points

Unlike fishes, most amphibians go through the process of _________.

5.

10 points

Fertilized eggs hatch into _____________, the aquatic stage of most amphibians.

6.

10 points

Most adult salamanders lack ______ and fins.

7.

10 points

In the _______-chambered heart of amphibians, one chamber receives oxygen-rich blood from the lungs and skin, and another chamber receives oxygen-poor blood from the body tissues.

8.

10 points

Because the ______ of amphibians must stay moist to exchange gases, most amphibians are limited to life on the water's edge or moist areas.

9.

10 points

Frogs and toads are __________ with no tails.

10.

10 points

_____________ are primarily tropical animals with small eyes that often are blind.