Question : What is heterospory ? Briefly comment on its significance.

1.	Question : What is heterospory ? Briefly comment on its significance. Give two examples.
Answer» Solution :•Two TYPES of spores are produced in pteridophytic plants like Selaginella and Salvinia, Microspore and megaspores are called heterosporous. Microspores and Megaspores produce male and female gametophytes respectively. • Significance : The female gametophytes in these plants are retained on the parent sporophyte for variable PERIODS. • The development of zygote into young embryo TAKES place within the female gametophytes. • This event is a precursor to the seed habit considered as an important step in EVOLUTION. Where all MEMBERS are heterosporous. e.g. selaginellay Salvinia, Marselia.

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