Give an example of such plant in which stem is modified to perform a special function, i.e. storage of water.

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Solution

Stem: It is the central part of a plant and bears all sorts of plant organs such as leaves, branches, and flowers.
The modification of the stem that enables them to store water is seen in Opuntia.
The stem of opuntia becomes thick and leaf-like and has a lot of fleshy substance within that stores the water.

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(a) Tuber	....................	....................
(b) Bulb	....................	....................
(c) Rhizome	....................	....................
(d) Corm	....................	....................

2. By modified roots:	....................	....................
3. By leaves:	....................	....................

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