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?
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Answer:
(a) it is a tuber.
(b) examples are potato
(c) the points y are eyes
(d) no need to burrow whole plant in soil where as a part of it which contain eye give rise to new plant
(e) vegetative reproduction
(f) more plants ( like potatoes ) are obtained
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The answers to the questions have been given below:
- a). The general name of the underground stems like the stem X is known as a tuber.
- b). An example of X is potato.
- c). The points Y present on the surface of the stem of the plant are referred to as buds.
- d). It is not necessary to plant the whole of the stem X into the ground to get new plants from the old stems. The buds on stem X are responsible for forming the organ of reproduction by forming a vegetative organ.
- e). The name of method of reproduction that occurs in such plants is known as vegetative propagation.
- f). One of the major advantages of growing new plants using this method is that this process is a faster process that helps in the growth of the plants from little seeds.
Hence, the appropriate answers to the given set of questions have been stated above.
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