Observe the picture. It depicts mangroves of Sunderbans and the numerous roots surrounding the main tree. Into which kind of tropic movement can this be categorized?

Positive geotropism

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Negative geotropism

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Negative hydrotropism

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Both B & C

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Solution

The correct option is D
Both B & C

In Sunderbans, the roots of mangroves show adaptive features because of water logged conditions. Roots grow upward (negative geotropism) and also show negative hydrotropism.

This happens for proper aeration of roots which otherwise doesn’t happen in waterlogged conditions.

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A potted plant is growing in a transparent glass jar. In this plant, X and Y are the two growing parts having a lot of meristematic tissue. It is observed that the part X of this plant exhibits positive geotropism but negative phototropism. On the other hand, part Y of this plant exhibits negative geotropism but positive phototropism.
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(b) Name the part Y of plant.
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