When a broken piece of the stem of a plant X is planted in the soil, a new plant grows from it in a week's time. The leaves of plant X also have many small entities Y in their margins which can fall to the ground alone or along with leaves and grow into new plants.

(e) Name a kind of dormant organ present in dry stems of old grass plants lying in the fields which get activated and produce green grass plants after the rains.

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Solution

Buds are present in the dry stems of old grass plants lying in the fields which get activated and produce green grass plants after the rain.

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When a broken piece of the stem of a plant X is planted in the soil, a new plant grows from it in a week's time. The leaves of plant X also have many small entities Y in their margins which can fall to the ground alone or along with leaves and grow into new plants.
(a) Name a plant which X could be.
(b) What are the entities Y present on the leaves of X known as?
(c) Name a plant other than X which can be reproduced from its leaves.
(d) Name a common plant grown in many homes which can be propagated from its broken stems like plant X.
(e) Name a kind of dormant organs present in dry stems of old grass plants lying in the fields which get activated and produce green grass plants after the rains.

A thickened underground stem X of a plant which is swollen with stored food has a number of points Y on its surface. When the old stem X is planted in the soil of a field in the next growing season, then each point Y present on its surface grows into a new plant.
(a) What is the general name of the underground stems like X?
(b) Give one example of X.
(c) What are the points Y present on X was known as?
(d) Is it necessary to plant the whole of stem X in the ground to obtain its new plants? Explain your answer.
(e) What is the name of this method of reproduction of plants?
(f) What is the advantage of growing new plants from the underground stems like X?

Q. A thickened underground stem X of a plant which is swollen with stored food has a number of points Y on its surface. When the old stem X is planted in the soil of a field in the next growing season, then each point Y present on its surface grows into a new plant.
(a) What is the general name of the underground stems like X?
(b) Give one example of X.
(c) What are points Y present on X known as?
(d) Is it necessary to plant the whole of stem X in the ground to obtain its new plants? Explain your answer.
(e) What is the name of this method of reproduction of plants?
(f) What is the advantage of growing new plants from the underground stems like X?

Q. When a broken piece of the stem of a plant X is planted in the soil, a new plant grows from it in a week's time. The leaves of plant X also have many small entities Y in their margins which can fall to the ground alone or alongwith leaves and grow into new plants.

(a) Name a plant which X could be.

Q. When a broken piece of the stem of a plant X is planted in the soil, a new plant grows from it in a week's time. The leaves of plant X also have many small entities Y in their margins which can fall to the ground alone or along with leaves and grow into new plants.

(d) Name a common plant grown in many homes which can be propagated from its broken stems like plant X.

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Standard VII Biology

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