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Question

In a woody dicotyledonous tree, which of the following parts will mainly consist of primary tissues:

A
Stem and root
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B
All parts
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C
Branches
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D
Flowers, fruit and leaves
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Solution

The correct option is D Flowers, fruit and leaves
The increase in the girth of the stem and the root in a dicot plant by the activity of lateral meristems is called secondary growth. The tissues produced by secondary growth are called secondary tissues. The remaining tissues are called primary tissues.
A dicot stem and root undergo secondary growth and hence have some secondary tissues. Branches of a dicot tree also show some secondary growth. Flowers, fruits and leaves are all made of primary tissues and hence are the answer.


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