51. The fibres present in the xylem of stem and roots are known as
52. The food reserve is a type of starch known as "floridean starch" in case of
53. Cork is obtained from which of the following plant?
54. Abscission of leaves is affected by the formation of an abscission zone
55. The storage organ of which of the following plants is not a stem?
56. Peanut plant is
57. Which of the following suborders comprises the viruses which attack bacteria and are known as bacteriophages?
58. Correlation amongst individuals with regard to their evolutionary history is called
59. Glow worm is
60. Desert plants have longer root system because
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