what make the phloem living

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Please find below the solution to the asked query.

Sieve tube elements and companion cells present in phloem, transport sugars and sap within the plant. They contain mitochondria, which produce ATP as an energy source. This ATP is used for active transport of sugars from the leaves to the phloem. This makes phloem living.

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Only the phloem fibre present in phloem as it working or active part is comprised of dead cells.
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phloem fibre
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its wrong.
 
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Seive tubes,companion cells,Phloem parenchyma are living cells.These make the Phloem living.
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Pholem parenchyma
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