Flowering in short day plants is induced by

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Question:
Flowering in short day plants is induced by

1.Short days and interrupted long nights

2.Short days and uninterrupted long nights

3.Long days and interrupted short nights

4.Long days and uninterrupted short nights

More MCQS Questions and answers

  1. α-Ketoglutarate dehydrogenase brings about
  2. 2,4-D causes ...
  3. A chemical believed to be involved in flowering is ... .
  4. A semipermeable membrane allows the diffusion of
  5. Ability of Venus Fly Trap to capture insects is due to ...
  6. Active transport occurs
  7. All of the following are plant growth inhibitors except;
  8. An essential element is that which
  9. Apical dominance is caused by ...
  10. Arithmetic growth curve is linear because
  11. As compared to anaerobic respiration, the energy gained during aerobic respiration is
  12. Assertion Dried seeds of Pea are kept in tin, water is poured over them up to upper level. A lid is put tight over it. Within an hour the lid is blown off Reason Due to rapid cell division in Pea see
  13. Assertion: Nitrogen fixing bacteria of legume root nodules survive in oxygen depleted cells. Reason: Leghaemoglobin completely removes oxygen from nodule cells
  14. ATP is
  15. Auxins are mainly produced by
  16. Bacteria that convert ammonia to nitrite belong to
  17. Biennials get changed into annuals by ...
  18. Bioassay for auxin is ..
  19. Brown heart disease is due to deficiency of
  20. Bulliform cells in Grass leaves show
  21. C4 plants differ from C3 plants with respect to
  22. Carbohydrates, the most abundant biomolecules on earth are produced by
  23. Cell respiration is carried out by
  24. Choose the wrong pair:
  25. Compensation point is the value of a factor where there is
  26. Count the number of true statements: (i) Application of gibberellins help early seed production in conifers. (ii) All synthetic auxins are widely used as herbicides. (iii) Kinetin promotes cytokin
  27. Denitrification is carried out by
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  29. Direction of conduction of food through phloem is
  30. During photorespiration, the oxygen consuming reaction(s) occur in
  31. Effect of auxin diffusing from apical bud on lateral shoots is known as
  32. Electrons lost by PS II are regained from
  33. Element which is a component of proteinaceous materials and protoplasm is
  34. Essential macronutrients are
  35. Exchange of substances between a cell and its environment is due to
  36. Find out the true statements about vernalization: (i) It is the promotion of flowering by a period of low temperature (ii) It prevents precocious reproductive development early in the growing season
  37. Flash of light in dark inhibits flowering in ..
  38. Flowering in short day plants is induced by
  39. Function of leghaemoglobin during biological nitrogen fixation in root nodules of legumes is to
  40. Function of red pigment leghaemoglobin present in root nodules of leguminous plants is to regulate
  41. Gene responsible for nitrogen fixation is
  42. Guttation is mainly due to
  43. How many molecules of NADH are produced when four molecules of phosphoglyceraldehyde are converted into four molecules of pyruvate
  44. How many of the following statements are true: (a) NAD mainly involved in catabolic pathway. (b) NADP mainly involved in anabolic pathway. (c) Non – cyclic electron transport is a multidirectional
  45. How many pigments are responsible for the colour of a plant leaf?
  46. Identify the following: (i) They have a special type of leaf anatomy. (ii) They tolerate a high range of temperature. (iii) They show responses to high light intensities. (iv) They lack photorespi
  47. In a plant subjected to continuous red light phytochrome will show ...
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  56. Minerals are absorbed in the form of
  57. Nitrifying bacteria convert
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  60. One of these is herbicide ...
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  62. Optimum temperature for photosynthesis is
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  67. Photoperiodism is:
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  83. The other name of glycolysis is
  84. Treatment of seeds at low temperature under moist conditions for breaking their dormancy is ... .
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