Answers

2015-05-22T18:17:52+05:30
Certain pteridophytes with two spores are called Heterospory.
The larger one is called megaspore and the smaller one is called microspore.The megaspore produces female gematophytes and the microspores produces male gematophytes. Therefore, they play a crucial role in evolution.
Examples:- angiosperms and gymnoesperms.
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