30.2-biology

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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.