Which one of the following statements is correct?(a) Horsetails are gy

1.	Which one of the following statements is correct?(a) Horsetails are gymnosperms(b) Selaginella is heterosporous, while Salvinia is homosporous(c) Ovules are not enclosed by ovary wall in gymnosperms(d) Stems are usually unbrancned in both Cycas and Cedrus.
Answer» The correct option is(c) Ovules are not enclosed by ovary wall in gymnosperms Explanation: In gymnosperms, ovules are not enclosed by ovary wall. Seeds do not occur inside a fruit. They are naked. Horsetail is the common name of Equisetum. Pteridophyte s like Selaginella and Salvinia are heterosporous and possess two types of spores, i.e. microspores and megaspores. Cycas has an unbranched columnar stem while Cedrus possess branched stem. Therefore, only statement (c) is correct.

Which one of the following statements is correct?(a) Horsetails are gymnosperms(b) Selaginella is heterosporous, while Salvinia is homosporous(c) Ovules are not enclosed by ovary wall in gymnosperms(d) Stems are usually unbrancned in both Cycas and Cedrus.

Answer»

The correct option is(c) Ovules are not enclosed by ovary wall in gymnosperms

Explanation:

In gymnosperms, ovules are not enclosed by ovary wall. Seeds do not occur inside a fruit. They are naked. Horsetail is the common name of Equisetum. Pteridophyte s like Selaginella and Salvinia are heterosporous and possess two types of spores, i.e. microspores and megaspores. Cycas has an unbranched columnar stem while Cedrus possess branched stem.

Therefore, only statement (c) is correct.

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