The circinate venation is the characteristic feature of ferns. It refers to [CPMT 2004]
A) Coiling of young leaves
B) Arrangement of leaves on stem
C) Attachment of sori on leaves
D) Heterophilly
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ANSWER
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THE ANSWER IS COILING OF YOUNG LEAVES
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THE ANSWER IS COILING OF YOUNG LEAVES
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Option A
Explanation:
The circinate venation can be defined as the coiling of the young leaves in the ferns. The newly born leaves rolls themselves from the apex to the base so that the apex appears in the middle of the coil.
This is a characteristic feature of the ferns and some cycads. The fern is frond and tightly rolled giving it a tendered look.
Once the newly formed coiled leaves starts photosynthesis then the water gradient decreases and the leaf opens.
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