Chapter 14 - Key Terms

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This exercise asks you to match the key term in the left-hand column with its correct definition in the right-hand column. Do this by typing the number of the key term in the box beside its correct definition.

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1. Acanthodians (p. 376)   Large, heavily armored, jawed fishes of the Paleozoic.
2. Amphibians (p. 384)   A group of small plants that arose during Early and Middle Devonian times; includes the tiny club mosses of the modern world.
3. Lobe-finned fishes (p. 379)   A reproductive structure of a plant that has the potential to grow into a new plant.
4. Lungfishes (p. 379)   A group of lobe-finned fishes with lungs, which allow them to gulp air when they are trapped in stagnant pools during the dry season.
5. Lycopods (p. 382)   A group of small jawless fishes of early and middle Paleozoic time, with paired eyes, bony armor, and small mouths.
6. Ostracoderms (p. 376)   Vertebrate animals that hatch and spend their juvenile period in the water, then usually metamorphose into air-breathing, land-dwelling adults, but return to the water to lay their eggs.
7. Placoderms (p. 377)   A group of jawed fishes that appeared in Devonian time and went on to dominate Mesozoic and Cenozoic seas, whose thin bones radiate from the body and support the fins.
8. Ray-finned fishes (p. 379)   A group of largely freshwater fishes with lungs and paired fins whose bones are attached to their bodies by a single shaft.
9. Seed (p. 384)   Small, elongate marine and freshwater fishes of middle Paleozoic age, with jaws, numerous paired fins supported by sharp spines, and scales rather than bony plates.

 

[CH 14 OSG]