A) By degeneration of protoplast of living cells
B) Tylosis formation
C) By deposition of resins, oil, gums etc
D) All of the above
Correct Answer: D
Solution :
By the deposition of resins, oils, gums etc., in the xylem cell wall, ?formation of tylosis? in xylem vessels and by degeneration of protoplast of living cell ?sap wood? is converted into ?heart wood?.You need to login to perform this action.
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