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Question : When an oak tree is kept in a poisonous solution, that rises to the top of the tree, even then the tree is ready to take another supply of poisonous solution followed by uptake of even pure water. This shows that

Answer»

Living cells are not involved in ASCENT of sap
Living cells play a MAJOR ROLE in ascent of sap
Both xylem and phloem play a major role in ascent of sap
Living cells play 60% role and VESSELS of xylem play 40% role in ascent of sap

Answer :A


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