PLANTS
TRANSPORT IN PLANTS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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for the company
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to withstand changes in water pressure
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to help them to the shops
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to provide energy to keep them alive
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to push the sugar up and down
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Detailed explanation-1: -Companion cells – transport of substances in the phloem requires energy. One or more companion cells attached to each sieve tube provide this energy. A sieve tube is completely dependent on its companion cell(s).
Detailed explanation-2: -Once the sucrose reaches the phloem tissue in a source, it needs to be actively transported into the companion cells and sieve tube members. This process does require energy, and this is why the companion cells must have many mitochondria to release this energy through cellular respiration.
Detailed explanation-3: -Function of companion cell is to load sugar and amino acids into sieve elements. These cells use transmembrane proteins to take up these molecules by active transport.
Detailed explanation-4: -The function of companion cells, a type of parenchyma cells, is to support sieve elements by carrying out cell metabolism and regulation. Plasmodesmata are intercellular channels that connect sieve elements to the companion cells.