Q801
Open questionThe fruit produced from bicarpellary, syncarpous and inferior ovary with calyx persistent and forming the 'pappus' is known as
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Biology GK · all questionsPlant Anatomy and Physiology
Plant Anatomy and Physiology
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Q802
Open questionConsider the following statements and choose the correct answer:
1. Transpiration usually occurs during day-time whereas guttation takes place in night
2. In transpiration water comes out in the form of liquid, whereas in guttation the water is given off in the form of vapour
3. Transpiration water is pure but guttation water contains inorganic salts and sugars
4. Transpiration is a controlled phenomenon whereas guttation is an uncontrolled phenomenon
1. Transpiration usually occurs during day-time whereas guttation takes place in night
2. In transpiration water comes out in the form of liquid, whereas in guttation the water is given off in the form of vapour
3. Transpiration water is pure but guttation water contains inorganic salts and sugars
4. Transpiration is a controlled phenomenon whereas guttation is an uncontrolled phenomenon
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Q803
Open questionDuring glycolysis, in the presence of ADP and the enzyme phosphoglycerokinase, 1, 3 - diphosphoglycerate is converted to
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Q804
Open questionWhich of the following are oxygen derivatives of carotenes containing 1 - 8 oxygen atoms?
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Q805
Open questionIn the presence of sun light, atomic oxygen from the photochemical reduction of NO2 reacts with a number of reactive hydrocarbons to form reactive intermediates called
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Q806
Open questionFor every four electrons donated to P680 during light reaction,
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Q807
Open questionWhich of the following is not a waste product produced by plants?
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Q808
Open questionThe factors that favour guttation include
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Q809
Open questionWater in plants is transported by
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Q810
Open questionThe radioactive isotopes are similar to normal elements in their chemical properties but differ in their number of
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Q811
Open questionThe movement of water molecules through the plasma membrane is called
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Q812
Open questionThe resistance of xerophytic leaves to water loss and wilting is primarily a function of
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Q813
Open questionWhich of the following are referred to as diageotropic?
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Q814
Open questionCarrot is orange in colour because
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Q815
Open questionIn Western Himalayas, at the altitude of 3,500 m, which of the following constitute 'elfin scrub' formation?
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Q816
Open questionConsider the following statements and choose the correct answer:
1. Most interactions between living organisms, or between organisms and the abiotic phases of the ecosystem, are mutual activities of organisms met by responses
2. A feed-back loop can be defined as the relationship in which a change in some original state of being "feeds back" onto that original state to alter the rate or direction of further change
3. In a positive feed-back relationship, the feed-back process maintains a dynamic homeostasis, or steady state
4. In a negative feed-back relationship, the feed-back process leads to a self-sustaining change
1. Most interactions between living organisms, or between organisms and the abiotic phases of the ecosystem, are mutual activities of organisms met by responses
2. A feed-back loop can be defined as the relationship in which a change in some original state of being "feeds back" onto that original state to alter the rate or direction of further change
3. In a positive feed-back relationship, the feed-back process maintains a dynamic homeostasis, or steady state
4. In a negative feed-back relationship, the feed-back process leads to a self-sustaining change
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Q817
Open questionMatch List-I (Vegetation names) with List-II (Vegetations) and select the correct answer:
| List-I | List-II |
| a. Megatherms | 1. Dominant vegetation is tropical deciduous forest |
| b. Mesotherms | 2. Dominant vegetation is tropical rain forest |
| c. Microtherms | 3. Dominant vegetation is alpine forest |
| d. Hekistotherms | 4. Vegetation is of mixed coniferous type |
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Q818
Open questionMatch List-I with List-II and select the correct answer:
| List-I | List-II |
| a. Oxylophytes | 1. Plants forming on sand and gravel |
| b. Halophytes | 2. Plants occurring on saline soils |
| c. Psychrophytes | 3. Plants growing on acid soils |
| d. Psammophytes | 4. Plants occurring on cold soils |
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Q819
Open questionWho among the following reported that Ozone (O3) inhibits infection, hyphal growth and uredospore formation of wheat stem rust fungus?
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Q820
Open questionAccording to Donald, the total production of two species growing in mixture is
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