which criteria are used for the classification of plants ? with reason,(9th class)
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Classification is based on the following criteria: Plant body: Presence or absence of a well-differentiated plant body. E.g. Root, Stem and Leaves. Vascular system: Presence or absence of a vascular system for the transportation of water and other substances.
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External features along with internal features like ultrastructure, anatomy, embryology and phytochemistry and natural affinities among organisms. This is the natural classification system criteria.
This system is used because:
1) Closely related species are grouped together.
2) Equal weightage to vegetative and sexual characters is given.
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