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Question
In old trees, central dark coloured, non-conducting part of secondary xylem is referred to as
In old trees, central dark coloured, non-conducting part of secondary xylem is referred to as
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Solution
The correct option is A heartwood
In old trees, the central dark region is called the heartwood. It consists of non conducting elements of xylem (vessels) with heavy deposition of lignin, invaded by tyloses, deposition of secondary metabolites like resins, tannins etcSo, the correct answer is 'heartwood'
In old trees, the central dark region is called the heartwood. It consists of non conducting elements of xylem (vessels) with heavy deposition of lignin, invaded by tyloses, deposition of secondary metabolites like resins, tannins etc
So, the correct answer is 'heartwood'
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