71. The tendency of plants to grow towards light:
(a) Geotropism (b) Phototropism
(c) Chemotropism (d) None of these
Answer: (b)
72. The reproductory organ of Plants:
(a) Root (b) Leaf
(c) Stem (d) Flower
Answer: (d)
73. The pigment imparts yellow colour to flowers:
(a) Xanthophyll (b) Anthocyanin
(c) Betacyanin (d) Haemoglobin
Answer: (a)
74. Hormone that helps for flowering in plants:
(a) Auxin (b) Cytokine
(c) Ethylene (d) Florigin
Answer: (d)
75. Who discovered cell?
(a) Robert Hook (b) JC Bose
(c) Galeileo (d) None of these
Answer: (a)
76. The plant cell wall is made up of:
(a) Chitin (b) Cellulose
(c) Keratin (d) Fibrin
Answer: (b)
77. Who discovered that plant body is made up of cells?
(a) M.J.Shleiden (b) Theodore Swan
(c) Robert Hook (d) None of these
Answer: (a)
78. What is known as the power house of the cell?
(a) Ribosome (b) Lysosome
(c) Mitochondria (d) Nucleus
Answer: (c)
79. The colour of chloroplast:
(a) Red (b) White (c) Blue (d) Green
Answer: (d)
80. The metal present in chlorophyll:
(a) Calcium (b) Zinc
(c) Magnisium (d) Potassium
Answer: (c)
81. The tendency of plants to grow towards the direction of
gravitational force:
(a) Geotropism (b) Phototropism
(c) Chemotropism (d) None of these
Answer: (a)
82. The rate of photosynthesis is highest in ..... light:
(a) Yellow (b) Blue
(c) Green (d) Red
Answer: (b)
83. The rate of photosynthesis is slowest in ..... light:
(a) Yellow (b) Green
(c) Blue (d) Red
Answer: (b)
84. Who discovered that animal body is made up of cells?
(a) M.J.Schleiden (b) Theodore Schwan
(c) Robert Hook (d) None of these
Answer: (b)
85. The hormone that is helpful for ripening of fruits:
(a) Auxin (b) Cytokine
(c) Ethylene (d) Florigin
Answer: (c)
86. Who proved that plants are living organisms?
(a) JC Bose (b) M.J.Schleiden
(c) Robert Hook (d) Theodore Schwan
Answer: (a)
87. The crop that depends rain for pollination:
(a) Pepper (b) Cardomom
(c) Paddy (d) Wheat
Answer: (a)
88. The organelle responsible for the maintenance of the
structure of cell?
(a) Nucleus (b) Endoplasmic reticulum
(c) Mitochondria (d) Vacoule
Answer: (b)
89. What are known as the ‘suicidal bags of the cell’?
(a) Mitochondria (b) Vacoule
(c) Nucleus (d) Lysosome
Answer: (d)
90. The plant with only one leaf:
(a) Colocasia (b) Amorphophalus
(c) Plantain (d) Vanda
Answer: (b)
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