Which of the following statement is correct ? (1) Ovules are not enclosed by ovary wall in gymnosperms (2) Selaginella is heterosporous, while Salvinia is homosporous (3) Horsetails are gymnosperms (4) Stems are usually unbranched in both Cycas and Cedrus Answer : (1) Ovules are not enclosed by ovary wall in gymnosperms...
Winged pollen grains are present in (1) Mustard (2) Cycas (3) Mango (4) Pinus Answer : (4) Pinus...
Distinguish between homosporous and heterosporous condition in pteridophytes. Answer : Ans: Majority of pteridophytes are homosporous.All spores produced od similar type. Example: Psilotum Heterosporous pteridophytes produce macro and microspores. Example: Selaginella. ...
Select the mismatch : (1) Rhodospirillum - Mycorrhiza (2) Anabaena - Nitrogen fixer (3) Rhizobium - Alfalfa (4) Frankia - Alnus Answer : (1) Rhodospirillum - Mycorrhiza...
58. Water containing cavities in vascular bundles are found in (1) Pinus (2) Sunflower (3) Maize (4) Cycas
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