Eichler divided plant kingdom in :-

Options

A. Two divisions
B. Four divisions
C. Five divisons
D. Ten divisions

Answer

**Step-by-Step Solution:**

1. **Understanding Eichler's Classification**: Eichler divided the plant kingdom based on the presence or absence of flowers and seeds. This classification is fundamental in botany.

2. **Identifying the Two Sub-Kingdoms**: The two main sub-kingdoms identified by Eichler are:
- **Cryptogamy**: This sub-kingdom includes plants that do not produce flowers or seeds. Instead, they reproduce through spores.
- **Phanerogamy**: This sub-kingdom includes plants that produce flowers and seeds.

3. **Divisions of Cryptogamy**: Cryptogamy is further divided into three divisions:
- **Thalophyta**: These are simple plants, such as algae, that do not have true roots, stems, or leaves.
- **Brophyta**: This division includes mosses and liverworts, which are non-vascular plants.
- **Pteridophyta**: This includes ferns and their relatives, which are vascular plants that reproduce via spores.

4. **Divisions of Phanerogamy**: Phanerogamy is divided into two divisions:
- **Gymnosperms**: These are plants that have naked seeds, meaning their seeds are not enclosed in an ovary.
- **Angiosperms**: These are flowering plants that produce seeds enclosed within a fruit.

5. **Conclusion**: Therefore, Eichler divided the plant kingdom into a total of five divisions: three from Cryptogamy (Thalophyta, Brophyta, Pteridophyta) and two from Phanerogamy (Gymnosperms, Angiosperms).

**Final Answer**: Eichler divided the plant kingdom into five divisions.

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