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.

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Solution

Dry stems of old grass plants produce green plants because they possess runners. Runners are special narrow, green above ground horizontal branches which develop at the bases of erect shoots called crowns. The runners spread in different directions and bear new crowns and tufts of adventitious roots. Each runner has one or more nodes which bear scale leaves and axillary buds. The axillary buds grow to form new aerial shoots or crowns.

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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) What is meant by vegetative propagation?
(b) Vegetative propagation involves the growth and development of 'something' present in the old part of the plant to form a new plant. What is this 'something'?
(c) Why do green grass plants spring up in dry fields on their own after the rains?

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