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Question

As a tree grows older, which increases more rapidly in thickness?


A
Sapwood
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B
Cortex
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C
Phloem
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D
Heartwood
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Solution

The correct option is C Heartwood
  1. Sapwood is the peripheral region of secondary xylem and is light colored.
  2. Cortex is the unspecialized tissue present between epidermis or vascular tissue of roots and stems.
  3. Phloem is the complex permanent tissue helps in the conduction of food upside down.
  4. Heartwood is the dead region of secondary xylem with highly lignified walls and helps in mechanical support and as the tree grows its formation increases as it also deposits waste material.
So the correct option is "Heartwood".

Biology

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