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Question

Which of the following is a modified stem for the protection of plants from grazing animals?

A
Tendrils
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B
Thorns
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C
Rhizome
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D
Tuber
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Solution

The correct option is B Thorns
Thorn is a stiff, sharp-pointed woody projection on the stem or other part of a plant. Thorns are found in many plants such as Citrus, Bougainvillea. They protect plants from grazing animals.

Tendril is referred to as a modified stem or leaf. It is found in some plants. It performs functions like support, attachments, and sometimes invasion. For example- In plants like grapevine and pumpkins, stem tendrils expand from axillary buds for climbing.

A rhizome is a type of stem modification where the adventitious roots are developed from the underground stem and those roots run along the ground and they come out which further develops into a new individual plant. This type of stem modification is seen in plants such as ginger, turmeric.

A tuber or stem tuber is considered the thickened section of an underground stem that is used to store food. Example : Potato, dahlia (sweet potato), carrot.

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