Taking an example of a plant, explain that stems are modified for making food in some plants.

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Solution

Modification of stem:
Stem gets modified to different structures to perform special functions.
Modification of stem for making food:
In plants like cacti, stem is modified to a fleshy structure.
This stem is green in colour and can perform photosynthesis to make food.

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1. By modified stems:

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

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

In Opuntia, the stem is modified into a flattened green structure to perform the functions of leaves, (i.e., photosynthesis). Cite some other examples of modifications of plant parts for the purpose of photosynthesis.

Q. Give two examples for each of the following.
(a) a modified stem
(b) flowers found as an inflorescence
(c) insectivorous plants
(d) plants whose leaves are modified to store food
(e) trees with prop roots
(f) plants with reticulate venation in their leaves
(g) flowers that are eaten

Q. Assertion :Stems of some plants protect from browsing animals.
Reason: Axillary buds of stems of these plants are modified into thorns.

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Taking an example of a plant, explain that stems are modified for making food in some plants.

Modification of stem:Stem gets modified to different structures to perform special functions.Modification of stem for making food:In plants like cacti, stem is modified to a fleshy structure.This stem is green in colour and can perform photosynthesis to make food.

Modification of stem:
Stem gets modified to different structures to perform special functions.
Modification of stem for making food:
In plants like cacti, stem is modified to a fleshy structure.
This stem is green in colour and can perform photosynthesis to make food.