07-reptiles_tran

07-reptiles_tran - 460:206 DINOSAURS What is a reptile? The...

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460:206 DINOSAURS What is a reptile? The amphibian-reptile transition
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Amphibia "double life" life in water and on land
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Problems with life on land: (plants and animals) No buoyancy, support needed Danger of drying out Extremes of temperature Gases behave differently No nutrients in air (animals only) Refraction of light changes Hearing must be modified
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What are the advantages for moving onto land?
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Paleozoic Land Ecology Devonian Land Floras Mosses Seed ferns SWAMPS
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Paleozoic Land Ecology Carboniferous Land Floras Seed ferns Cycads Conifers FORESTS
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Paleozoic Land Ecology Seed ferns Cycads Conifers FORESTS
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Evolution of the Insects Giant Dragonfly (2 foot wingspan)
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What is a reptile? A group of animals that includes lizards, snakes, crocodiles, turtles Characters: ectothermic, have scales, and most lay shelled eggs with a leathery casing.
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Early Reptiles Carboniferous Period Small bodied Five-fingered forelimb Small skull, short jaw neck joint for swiftness
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Small body advantages
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Amphibians vs. Reptiles Trait
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07-reptiles_tran - 460:206 DINOSAURS What is a reptile? The...

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