Your cart is empty.
Practice each question, then open the answer or worked solution.
Match the parts of the plant given in Column I with their function in Column II
Column I | Column II |
(a) Leaf | (i) Excretion |
(b) Flower | (ii) Bears Branches |
(c) Stem | (iii) Photosynthesis |
(d) Root | (iv) Reproduction |
(v) Anchorage |
Ans: The correct match is
Column I | Column II |
a) Leaf | (iii) Photosynthesis |
b) Flower | (iv) Reproduction |
c) Stem | (ii) Bears Branches |
d) Root | v) Anchorage |
Boojho wanted to test the presence of starch in leaves. He performed the following steps.
(1) He took a leaf and boiled it in water,
(2) He placed the leaf in a petri dish and poured some iodine over it. He did not get the expected result. Which step did he miss? Explain.
Ans: Boojho skipped the step where he was supposed to boil the leaf in alcohol to eliminate the green colour of chlorophyll, which was required since chlorophyll interferes with the starch test.
Will a leaf taken from a potted plant kept in a dark room for a few days turn blue-black when tested for starch? Give reasons for your answer.
Ans: To synthesize starch, the leaf should have gone under photosynthesis. The potted leaf did not undergo the same; there was no process of fresh starch food.
Can the stem of a plant be compared with a street with two–way traffic? Give a reason.
Ans: A plant's stem can be compared to two-way traffic. Because in the stem there are two types of tubes, one carries water and minerals from roots to the leaves and other parts. And the other tubes carry food from leaves to other parts of the plant, and roots.