BotanyIn which of the following types of phyllotaxy a pair of leaves arise at each node :

In which of the following types of phyllotaxy a pair of leaves arise at each node :

  1. A

    opposite 

  2. B

    alternate

  3. C

    whorled

  4. D

    verticellate

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    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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