Aims and Objective of Plant Systematics

Hie aims, and objects of natural classification are to name, describe, and arrange plants. Inis arrangement should show degree of relationship among plains. This degree of relationship is called affinities. Thus the aim of systematic is to develop affinities among plants. The comparison of plants gives resemblances and differences to van ing degrees. It is obvious that the plants which have several 0111111011 characteristic;s lutist have common origin.



For example, the angiospermic plants produce flowers. Their megasporangia (ovules) are covered by ovary. Ovary ripens to form fruit. All angiosperms have vessels in the xylem. These common characters show that the angiosperms Must have some common ancestor. Similarly. Angiosperms shares some characteristics with the gymnosperms. Both are seed producing plants. They have similar internal structure of stem. It shows that some kind of close affinities are present between these two groups. These similarities are arised to due to common ancestry. Therefore, angiosperms and gymnosperms are arranged very close to each other. These groups also share characteristics with Pteridophytes. All these three groups. Pteridophytes, Gymnosperms and Angiosperms develop vascular tissues and they have dominant sporophyte generations. Thus these three groups are placed in larger taxonomic group. In this way, affinities are developed between different groups of plants. They are arranged into taxonomic hierarchy on the basis of these affinities.

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