Define heterospory. What is its biological significance?

Heterospory is the production of two distinct types of spores in certain plants, typically a small microspore and a larger megaspore, each giving rise to different types of gametophytes. This phenomenon occurs in a variety of plants, including some algae, fungi, and terrestrial plants such as seed plants, ferns, and certain types of bryophytes. Microspores generally develop into male gametophytes, while megaspores develop into female gametophytes. The distinction in spore size and the resulting gametophytes is a key feature of heterospory.

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