(D) Raphides are needle-like crystals of $Calcium$ oxalate found in the cells of many plants.These crystals serve as a defense mechanism against herbi

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(D) Raphides are needle-like crystals of $Calcium$ oxalate found in the cells of many plants.These crystals serve as a defense mechanism against herbivores and are stored in specialized cells called idioblasts.Therefore, the correct option is $D$.

Class 11 Biology Anatomy of Flowering Plants Permanent Tissue

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Raphides are

A
Starch
B
Silica
C
Calcium carbonate
D
Calcium oxalate

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Anatomy of Flowering Plants

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Permanent Tissue

Companion cells are closely associated with

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Which of the following plant cells lack a vacuole and a nucleus at maturity?

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In the first formed primary xylem,the secondary wall thickening may be of

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Which of the following shows the presence of a semipermeable membrane?

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Raphides are

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Companion cells are closely associated with

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Which of the following shows the presence of a semipermeable membrane?

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