NEET 2021 · BiologyPteridophytesPrevious Year Question
Genera like Selaginella and Salvinia produce two kinds of spores. Such plants are known as:
Answer: (B) Heterosporous. Answer: (B) Heterosporous.
- A.Homosporous
- B.Heterosporous✓
- C.Homosorus
- D.Heterosorus
Correct Answer
(B) Heterosporous
Solution & Explanation
Answer: (B) Heterosporous. Solution: Plants producing two kinds of spores — large megaspores and small microspores — are termed heterosporous, exemplified by Selaginella and Salvinia. Most pteridophytes produce only one kind of spore and are homosporous. "Homosorus" and "Heterosorus" are not valid terms (the sorus is a cluster of sporangia, not a spore-type category). NCERT Reference: Class XI Biology, Plant Kingdom, p.32, lines 14-17 — "Genera like Selaginella and Salvinia which produce two kinds of spores, macro (large) and micro (small) spores, are known as heterosporous."
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