why do most amphibians lay their eggs in water
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Amphibians have soft, generally moist skin without scales. Their eggs do not have shells and so they must be laid in water or a damp environment to keep from drying out. Amphibians go through a two-stage life cycle: 1) when an amphibian hatches, it is in a gilled larval form.
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Amphibian Eggs
Unlike other tetrapod vertebrates (reptiles, birds, and mammals), amphibians do not produce amniotic eggs. Therefore, they must lay their eggs in water so they won't dry out. ... This helps to ensure that eggs will be fertilized and at least some of the embryos will survive.
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