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Question

The folding or rolling of a leaf on itself, when present in a bud is called as

A
Ptyxis
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B
Venation
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C
Phyllotaxy
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D
Nastic movements
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Solution

The correct option is B Ptyxis
Ptyxis means arrangement of single leaf in bud condition. It is the way in which a leaf remains folded in the bud. The folding or rolling of a leaf on itself when present in a bud is called as ptyxis. For example, in ferns, a leaf frond is coiled like a spring that gradually unfolds as the leaf frond matures. The way in which an individual leaf is folded in the bud.
Thus, the correct answer is option A.


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