61. Fern belongs to
(a) Bryophyta.
(b) Pteridophyte
(c) Anthophyta
(d) None of these
62. In which section of the plant does photosynthesis take place?
(a) Roots
(b) Stem
(c) Leaves
(d) Flowers
63. Photosynthesis takes place faster in
(a) Yellow light
(b) White light
(c) Red light
(d) Darkness
64. Age of a tree can be determined by
(a) Counting the number of rings in the stem
(b) Counting the number of leaves
(c) Counting the number of branches
(d) Measuring the size of the tree
65. The green colour leaves are due to the presence of
(a) Metallic ions
(b) Haemoglobin
(c) Iron
(d) Chlorophyll
66. During the day time plants –
(a) Take in oxygen and give out carbon dioxide
(b) Take in carbon dioxide and give out oxygen
(c) Take in nitrogen and give out oxygen
(d) Take in carbon dioxide and give out nitrogen
67. Plants receive their nutrients mainly from
(a) Chlorophyll
(b) Atmosphere
(c) Light
(d) Soil
68. Potato is a modified form of
(a) Root
(b) Stem
(c) Fruit
(d) Leaf
69. A plant cell is distinguished from an animal cell by the presence of
(a) Nucleus
(c) Cell membrane
(d) Cytosol
(b) Chloroplasts
70. A man with blood group A can receive blood from persons having blood groups.
(a) A, O
(b) A, B, O
(c) A, AB, B
(d) A, B