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Q.

Which of the following statements is correct ?

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a

Ovules are not enclosed by ovary wall in gymnosperms

b

Selaginella is heterosporous, while Salvinia is homosporous

c

Horsetails are gymnosperms

d

Stems are usually unbranched in both Cycas and Cedrus

answer is A.

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Detailed Solution

Seeds of gymnosperms are naked , not covered by ovary wall . Selaginella and Salvinia both are heterosporous. Horse tails are pteridophytes . Stems are unbranched in Cycas and branched in Cedrus .

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