Oceanography Quiz 6

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9 Terms

1
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What are the four orders of marine vertebrates?

jawless(agnatha), sharks(condrichthyes), lobe-finned fish, bony fish(osteichthyes)

2
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How do sharks osmoregulate?

Keeping in urea to have their bodily fluids be the same salinity as the ocean

3
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How do sharks stay buoyant?

their pectoral fins and liver oil

4
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How do sharks get the most nutrients from food?

they have spiral valves in their intestines

5
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What are the three ways sharks reproduce?

viviparous (live birth), oviparous (eggs), ovoviviparous (eggs in mother’s body)

6
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What are the special characteristic of lobe-finned fishes?

they have bones in their fins and are the ancestors of land vertebrates

7
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What are the four orders of marine mammels?

Pinnipedia, carnivora. sirenia, cetacea (whales)

8
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Which order of marine animals are keystone species?

carnivora

9
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What are the two types of whales?

toothed and baleen