Q961
Open questionThe aeciospores of Puccinia graminis tritici germinate only on the leaves of
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Biology GK · all questionsPlant Anatomy and Physiology
Plant Anatomy and Physiology
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Q962
Open questionIncrease in the number of hydrogen protons in the thylakoid space results in
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Q963
Open questionThe micro-organisms which are free-floating throughout their entire life cycle form actually the
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Q964
Open questionWho among the following proposed that in plant cells, CO2 is first reduced to formaldehyde, followed by condensation of the formaldehyde molecules to form sugars?
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Q965
Open questionDwarf Mexican, Sonora-64, Lermo Rojo varieties of wheat have been found to be resistant against
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Q966
Open questionThe most important natural abscission-accelerating factor in senescing leaves appears to be
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Q967
Open questionThe prevention of plants from being exposed to the agencies responsible for various plant diseases is known as
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Q968
Open questionWhich of the following plant hormones regulates growth particularly by stimulating cell elongation in stems?
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Q969
Open questionAfter the cold requirement is satisfied, the actual germination, in most situations, takes place efficiently at about
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Q970
Open questionThe most definite information about cytokinin synthesis concerns the formation of
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Q971
Open questionConsider the following statements and choose the correct answer:
1. For the development of viable seeds the double fertilization is very necessary
2. The net result of double fertilization is the formation of endosperm from the triploid nucleus
3. In Angiosperms very free nuclear divisions take place as in Gymnosperms
4. The endosperm nucleus has both maternal and paternal characters showing physiological importance like hybrid vigour
1. For the development of viable seeds the double fertilization is very necessary
2. The net result of double fertilization is the formation of endosperm from the triploid nucleus
3. In Angiosperms very free nuclear divisions take place as in Gymnosperms
4. The endosperm nucleus has both maternal and paternal characters showing physiological importance like hybrid vigour
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Q972
Open questionOrganisms, both resting and swimming types, that are confined to the water surface are known as
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Q973
Open questionAccording to Hutchinson, the totality of biotic and abiotic factors to which a given species is uniquely adapted is known as
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Q974
Open questionOf the elements of the flora of India, which of the following is dominant?
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Q975
Open questionThe process of occupation of a particular area by different plant communities from their birth to maturity is known as
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Q976
Open questionWhich of the following plants can be propagated when planted in soil?
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Q977
Open questionThe examples of plants possessing ruminate endosperm include
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Q978
Open questionOn the maturation of the archegonium, which of the following disintegrate forming a mucilaginous substance?
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Q979
Open questionMatch List-I with List-II and select the correct answer:
| List-I | List-II |
| a. Short-day plant | 1. Nicotiana tabacum |
| b. Long-day plant | 2. Beta vulgaris |
| c. Day-neutral plant | 3. Pisum sativum |
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Q980
Open questionThe sensitivity of lettuce seeds to farred irradiation increases
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