The earliest, most ancestral plants and animals relied on external water for reproduction.  Later plants and animals evolved to the point where external water was no longer necessary 1.  Explain why both ferns and mosses need external water for reproduction and flowering plants don't  2.  Explain why most amphibians need external water for reproduction and reptiles don't

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The earliest, most ancestral plants and animals relied on external water for reproduction.  Later plants and animals evolved to the point where external water was no longer necessary

1.  Explain why both ferns and mosses need external water for reproduction and flowering plants don't 

2.  Explain why most amphibians need external water for reproduction and reptiles don't 

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