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Question
In which of the following there is no differentiation heart wood and sap wood?
In which of the following there is no differentiation heart wood and sap wood?
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Solution
The correct option is D Palm
Heart wood and sap wood are the result of sufficient activity of vascular cambium. Heart wood is the central region of old trees, that is formed earlier during secondary growth, with tannins, resin and other substances imparting it the black color. It serves to provide mechanical support. Sap wood in outer region of recently formed wood which is lighter in color. Vascular cambium is a lateral cambium, which is produced by primary permanent tissues and divides to produce secondary tissues during secondary growth, which in turn increase the girth of the plants. Monocots do not produce lateral cambium and hence lack secondary growth, which means that heart wood and sap wood are not produced.
Heart wood and sap wood are the result of sufficient activity of vascular cambium. Heart wood is the central region of old trees, that is formed earlier during secondary growth, with tannins, resin and other substances imparting it the black color. It serves to provide mechanical support. Sap wood in outer region of recently formed wood which is lighter in color.
Vascular cambium is a lateral cambium, which is produced by primary permanent tissues and divides to produce secondary tissues during secondary growth, which in turn increase the girth of the plants. Monocots do not produce lateral cambium and hence lack secondary growth, which means that heart wood and sap wood are not produced.
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