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Question
When a tree grows older which of the following increase rapidly?
When a tree grows older which of the following increase rapidly?
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Solution
The correct option is A Heart wood
Heartwood, also called as duramen, dead, central wood of trees. Its cells usually contain tannins or other substances that make it dark in colour and sometimes aromatic. Heartwood is mechanically strong, resistant to decay, and less easily penetrated by wood preservative chemicals than other types of wood. One or more layers of living and functional sapwood cells are periodically converted to heartwood. All wood in a tree is first formed as sapwood but later sapwood will get converted into heart wood. So, when a tree grows older, heartwood increase rapidly and not sapwood, pith or cortex So, the correct answer is 'Heart wood'
Heartwood, also called as duramen, dead, central wood of trees. Its cells usually contain tannins or other substances that make it dark in colour and sometimes aromatic. Heartwood is mechanically strong, resistant to decay, and less easily penetrated by wood preservative chemicals than other types of wood. One or more layers of living and functional sapwood cells are periodically converted to heartwood. All wood in a tree is first formed as sapwood but later sapwood will get converted into heart wood. So, when a tree grows older, heartwood increase rapidly and not sapwood, pith or cortex
So, the correct answer is 'Heart wood'
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