The exceptional character of fern leaf tips are

Circumnutation

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Nutation

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Circinate ptyxis

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All of the above

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Solution

The correct option is C Circinate ptyxis
Ptyxis is the way in which a leaf is folded during its developmental stages. Circinate vernation is a coiled arrangement of leaves, called as fronds in fiddleheads of ferns. When fronds are formed in ferns, they are tightly curled, so that the tips of young leaves are protected within the coil.

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