Amphibian Review

Why aren't humans considered ectothermic?

• Because our body temperature generally stays the same in all conditions

• Because we give birth to live young

• Because we have skeletons made of bone, not cartilage

• Because we can't breathe underwater

What type of vertebrates existed before amphibians?

• Land animals only

• Sea animals only

• Both land and sea animals

• Dinosaurs

Amphibian means _____.

• Land water
• Double life
• Land mammal
• Aquatic mammal 

An amphibian has a ____ chambered heart

• 1
• 2
• 3
• 4

Tags

NGSS.MS-LS4-2

Amphibians developed from _____

• Ray finned fish
• Lobe finned fish
• Lung Fish
• Bony Fish 

Tags

NGSS.MS-LS4-2

To get air through their skin, amphibians must

• stay moist
• eat insects
• live in holes
• lay eggs

All amphibians are vertebrate.

• True
• False

When the amphibians first moved onto land, there was

• an environment relatively free from predators.

• a readily available food source.

• competition with the reptiles.

• An environment relatively free from predators and a readily available food source are both correct.

Gas exchange across the skin is called

• ram ventilation.

• countercurrent exchange.

• cutaneous respiration.

• branchial respiration.

Because amphibians depend on external sources of heat to maintain body temperatures, they are said to be

• endothermic.

• amphithermic.

• isothermic.

• ectothermic.