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Question
In old dicot stems, a major part of the wood is filled up with tannins, resins, gums etc. This part of wood is called as
In old dicot stems, a major part of the wood is filled up with tannins, resins, gums etc. This part of wood is called as
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Solution
The correct option is B Heart wood
With the advance in age, the central axis of secondary xylem becomes inactive, losing water and stored food material. It becomes infiltrated with various organic chemicals like oil and ergastic substances (byproducts of metabolism). This region becomes hard in texture and dark in color and is called heart wood or duramen. This zone loses the function of conduction of nutrients. Thus, the correct answer is option B.
With the advance in age, the central axis of secondary xylem becomes inactive, losing water and stored food material. It becomes infiltrated with various organic chemicals like oil and ergastic substances (byproducts of metabolism). This region becomes hard in texture and dark in color and is called heart wood or duramen. This zone loses the function of conduction of nutrients.
Thus, the correct answer is option B.
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