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| 21. | Stem of Psilophyton an example of psilogsida is differentiated into an underground rhizome and an aerial part both of which are _____ branched | |||||||
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| 22. | Which of the following group of tracheophyta has expanded or scale like leaves which are alwaysed arranges in whorls? | |||||||
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| 23. | Which of the following tracheophytes are leafless? | |||||||
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| 24. | Sporangia of which of the following tracheopytes develop singly on the upper side of sporophylls which may or may not be arranged to form strobili. | |||||||
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| 25. | Gametophyte of Psilopsida develops a symbiotic association with which of the following? | |||||||
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| 26. | Which of the following is an example of the living member of Psilopsida? | |||||||
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| 27. | In term of spore production Selaginella is characterized by | |||||||
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| 28. | Which of the following tracheophytes are also called arthrophytes? | |||||||
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| 30. | Today the land habitat is dominated by | |||||||
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| 31. | Of the following which one is not the characteristic of the plants included in psilopsida? | |||||||
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| 34. | The space between the overtopped dichotomous branches was occupies by a sheet of _____ cells during evolution of megaphyllas. | |||||||
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| 37. | Which of the following plant group first formed true leaves? | |||||||
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| 38. | Megaphylls i.e. leaves with divided veins with an expanded lamina is a dharacteristic of : | |||||||
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| 39. | The arrangement of unequal dichotomous branches in one plane during evolution of leaves is called | |||||||
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