Animal Diversity Vertebrates: Fish & Amphibians

What is a unique characteristic of all chordates?

• Presence of scales

• Ability to fly

• Dorsal hollow nerve cord

• Warm-bloodedness

Which group of vertebrates are known as ectotherms?

• Only reptiles

• Birds and mammals

• Fish, amphibians, and reptiles

• Only amphibians

Which vertebrates are considered endotherms?

• Only mammals

• Fish and amphibians

• Birds and mammals

• Reptiles and birds

What is the primary way fish obtain oxygen?

• Absorbing from water

• Through their skin

• Using lungs

• Through their gills

What distinguishes cartilaginous fish from other fish?

• Bones made of cartilage

• Presence of swim bladders

• Absence of jaws

• Warm-bloodedness

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How do most sharks ensure water flows over their gills?

• Breathing air

• Continuous swimming

• Using a pumping mechanism

• By staying still

What adaptation allows bony fish to maintain stability at different depths?

• Gills

• Scales

• Swim bladder

• Powerful fins

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What does the term 'amphibian' mean?

• Cold-blooded

• Double life

• Land dwellers

• Water breathers

During which stage do amphibians typically undergo metamorphosis?

• After death

• As larvae

• During the egg stage

• As adults

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What is a significant environmental challenge facing amphibians?

• Lack of food

• Overpopulation

• Excessive cold

• Habitat destruction

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