Phyllotaxy is

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arrangement of young leaves in bud

arrangement of mature leaves on branches

arrangement of branches

arrangement of floral leaves in a floral bud

answer is B.

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Detailed Solution

Phyllotaxy is the pattern of arrangement of leaves on the stem or branch. This is usually of three types – alternate, opposite and whorled. In alternate type of phyllotaxy, a single leaf arises at each node in alternate manner, as in china rose, mustard and sun flower plants. In opposite type, a pair of leaves arise at each node and lie opposite to each other as in Calotropis and guava plants. If more than two leaves arise at a node and form a whorl, it is called whorled, as in Alstonia.

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