Question

WHT is heterospory? Briefly comment on its significance. Give two examples

Answer 1

Answer:

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Heterospory means the formation of two distinctly different spores. The smaller one, designated as microspore later on gives rise to the male gametophyte and the larger one called megaspore gives rise to female gametophyte. Heterospory commonly occurs in all gymnosperms and certain pteridophytes such as Selaginella.

Answer 2

Answer:

The phenomenon of producing two different kinds of spores in the same plant is known as heterospory.

Significance of heterospory:

• Heterospory leads to the development of seeds in gymnosperms and angiosperms.

• It is required in the differentiation of male and female gametophytes.

Examples: Salvinia, Selaginella