Which one of the following statements is correct ?A. Horsetails are gymnospermsB. Selaginella is heterosporous , while Salvinia is homosporousC. Ovules are not enclosed by ovary wall in gymnospermsD. Stems are usually unbranched in both Cycas and Cedrus.

Which one of the following statements is correct ?A. Horsetails are gy

1.	Which one of the following statements is correct ?A. Horsetails are gymnospermsB. Selaginella is heterosporous , while Salvinia is homosporousC. Ovules are not enclosed by ovary wall in gymnospermsD. Stems are usually unbranched in both Cycas and Cedrus.
Answer» In gymnosperm ovules are not enclosed by ovary wall . Seeds do not occur inside a fruit . They are naked . Horsetail is the common name of Equisetum . Pteridophytes 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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Which one of the following statements is correct ?A. Horsetails are gymnospermsB. Selaginella is heterosporous , while Salvinia is homosporousC. Ovules are not enclosed by ovary wall in gymnospermsD. Stems are usually unbranched in both Cycas and Cedrus.

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