Natural system of classification includes the study of:
I. Reproductive structures
II. Height and girth of the plant
III. Ultrastructure and anatomy
IV. Embryology and phytochemistry

Only I and II

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Only II and III

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Only III and IV

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Only I and IV

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Solution

The correct option is C Only III and IV
Natural system of classification includes the study of ultrastructures and anatomy of plants. Ultrastructure is the fine structure of the cell that is visible through electron microscopy. Anatomy is the internal structure of the organism. It also includes the study of embryos and their development and the chemicals produced by the plants (other than sugars) such as resin, sap and tannins.
Reproductive structures like stamens and height and girth of the plant are studied in the artificial system of classification.

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Types of Classification

Standard XII Biology

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Natural system of classification includes the study of: I. Reproductive structures II. Height and girth of the plant III. Ultrastructure and anatomy IV. Embryology and phytochemistry

Natural system of classification includes the study of:
I. Reproductive structures
II. Height and girth of the plant
III. Ultrastructure and anatomy
IV. Embryology and phytochemistry