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Questions and Answers
Which of the following is NOT included in the definition of a fish?
Which of the following is NOT included in the definition of a fish?
- Lampreys
- Bony fish
- Hagfish
- Sharks (correct)
What percentage of living fish species are ray-finned fish?
What percentage of living fish species are ray-finned fish?
- 99%
- 50%
- 5%
- 95% (correct)
During which period did the first fish with jaws appear?
During which period did the first fish with jaws appear?
- Paleozoic era
- Silurian period (correct)
- Cambrian period
- Cretaceous period
What allowed the soft-bodied chordates to be more agile than their invertebrate counterparts?
What allowed the soft-bodied chordates to be more agile than their invertebrate counterparts?
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What did many fish of the Paleozoic era develop as protection against predators?
What did many fish of the Paleozoic era develop as protection against predators?
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