A celery stalk with leaves is placed in water with blue dye. After 2 days, the stem is cut and its cross section observed. What are the blue dots present in the cross section of the celery stalk?

Phloem

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Xylem

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Xylem and phloem

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None of these

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Solution

The correct option is B Xylem
The blue dots present in the cross section of the celery stalk are of xylem.
Xylem is a network of small, hollow tubes that stretches from roots to stem and leaves. It is responsible for conduction of water with dissolved minerals from roots to all parts of plants.
When water is mixed with coloured dye, xylem gets stained the same colour.

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