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6 Cards in this Set
- Front
- Back
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class amphibia
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frogs, toads, salamanders, ceicilians
-larval and mature stage -evolved from lobed fin fish -first tetrapods on land |
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amphibian means
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2 lives
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amphibian reproduction
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external fertilization
1.amplexus(male) 2.egg release 3.sperm release 4.tadpole 5.metamorphosis 6.little adult |
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metamorphosis
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thyroxine
thyroid hormone causes metamorphosis |
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amphibian reproductive variation
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-paedomorphis(salamanders)
-bypass larval stage -male incubates eggs -female incubates eggs |
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variations
bypass larval stage |
hatch out little adults
-darwin frog |
