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  4. In which of the following option correct examples of plants are represented respectively showing alternate, opposite, and whorled phyllotaxy?

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Q. In which of the following option correct examples of plants are represented respectively showing alternate, opposite, and whorled phyllotaxy?

NTA AbhyasNTA Abhyas 2020Morphology of Flowering Plants

Solution:

Phyllotaxy can be defined as the pattern of arrangement of leaves on the stem or branch. In alternate phyllotaxy a single leaf is originated at each node in alternate manner. Examples - mustard, sunflower and china rose. In opposite phyllotaxy, a pair of leaves is originated at each node and is arranged opposite to each other. Examples - Calotropis and guava plants. In Whorled phyllotaxy more than two leaves are originated at a node and form a whorl. Example - Alstonia.