Why the transport of organic food through phloem is bidirectional?

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The relationship between the two regions is variable

Roots serve as source, while leaves are the sink region

Source and sink regions are irreversible

Translocation of organic solute is regulated by energy

answer is B.

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Detailed Solution

Long distance transport of the substance takes place through bulk flow system. Organic nutrient are supplied over long distance transport by phloem tissue form source to sink region. The direction of transport of these organic nutrients can be upwards or downward, i.e., bidirectional.

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