Term
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Definition
| A defensive feature found in many lizard and salamander species, where the tail vertebrae are easily broken, so that the tail will break off if it is grabbed by a predator. Also called tail separation. |
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Term
| When frogs and toads go through metamorphosis what body feature do they GAIN? |
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Definition
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Term
| What caused aquatic tetrapods to leave their aquatic environment? |
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Definition
| The drying up and shrinking of ponds. |
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Term
| Because amphibians live on land, they use more energy to get around. What does this increased activity level require (that fish do not need)? |
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Definition
| The increased activity lead to a greater need for OXYGEN - therefore LUNGS, and a three-chambered heart). |
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Term
| Ostracoderms were an ancient, armored,jawless fish. What were Placoderms? |
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Definition
| Placoderms are extinct bony-plated fish (vertebrates) thought to have been the earliest vertebrates with JAWS. |
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Term
| What was the earliest fish to evolve? |
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Definition
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