作业帮什么是两栖动物
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什么是两栖动物
什么是两栖动物
什么是两栖动物
两栖动物是需要在水中产卵,发育过程中有变态,幼体（蝌蚪）接近于鱼类,而成体可以在陆地生活的动物.
又能在地上活，又能在水里活
青蛙
Amphibians are creatures which spend part of their life in water and part of their life on dry land.
Amphibians are one of the groups of vertebrates, and are characterised by being cold blooded an...
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Amphibians are creatures which spend part of their life in water and part of their life on dry land.
Amphibians are one of the groups of vertebrates, and are characterised by being cold blooded and having moist skin, through which they can also absorb oxygen. They include frogs, toads, newts, salamanders (including axolotls) and caecilians, which all start their lives as eggs. They hatch out as tadpoles which breathe through gills and a spiracle. As they grow, they develop lungs and legs, and are able to leave the water and walk on land, apart from axolotls.
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