Heterospory i.e., formation of two types of spores – microspores and megaspores is a characteristic feature in the life cycle of a few members of pteridophytes and all spermatophytes. Do you think heterospory has some evolutionary significance in plant kingdom?
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• Yes, heterospory has evolutionary significance in plants.
• Heterospory led to in situ embryo development. The embryo derives nutrition from the female gametophyte and hence are better protected.
• Heterospory led to the evolution of seed habit, which helped the plants to flourish and tide over long periods of unfavourable conditions...
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