Heartwood helps in

Ascent of sap

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Mechanical support

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Ascent of sap and mechanical support

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Translocation of food

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Solution

The correct option is B
Mechanical support

Heartwood, also called duramen is found in the inner part of the stem. It is highly lignified and filled with resins, oils, gums and tanin. Heartwood is very hard and the main function is to provide mechanical support to the body.

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Heartwood differs from sapwood in:

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