Question

what is heterospory? comment on its significance​

Answer 1

Answer:

Heterospory is the production of spores of two different sizes and sexes by the sporophytes of land plants. The smaller of these, the microspore, is male and the larger megaspore is female. Heterospory evolved during the Devonian period from isospory independently in several plant groups: the clubmosses, the arborescent horsetails,and progymnosperms.This occurred as part of the process of evolution of the timing of sex differentiation.

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Answer 2

Answer:

Explanation:

Heterospory is the production of spores of two different sizes and sexes by the sporophytes of land plants. The smaller of these, the microspore, is male and the larger megaspore is female.

Heterospory is the phenomenon in which two different kinds spores are produced. These spores differ in size.  The smaller spore is called microspore while the larger spore is called megaspore.

Microspore gives rise to the male gametophyte while the megaspore gives rise to the female gametophyte.

It was first evolved in pteridophytes.

The heterospory is the first step of evolution of seed development in gymnosperms and angiosperms.

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