The most diverse group of plants on earth are

Options

A. Bryophytes
B. Ferns
C. Gymnosperms
D. Angiosperms.

Answer

**Step-by-Step Solution:**

1. **Understanding Plant Classification:**
- The plant kingdom is divided into two main sub-kingdoms: Cryptogams and Phanerogams.
- Cryptogams are plants that reproduce via spores and have hidden reproductive structures, while Phanerogams have visible reproductive structures.

2. **Identifying the Groups:**
- Cryptogams include groups like Thalophyta (algae), Bryophyta (mosses), and Pteridophyta (ferns).
- Phanerogams are further divided into Gymnosperms and Angiosperms.

3. **Defining Gymnosperms and Angiosperms:**
- Gymnosperms are plants that produce naked seeds (seeds not enclosed in an ovary).
- Angiosperms are plants that produce seeds enclosed within a fruit (ovary), making them more advanced.

4. **Diversity in Angiosperms:**
- Angiosperms are further classified into two groups: Monocots (one cotyledon) and Dicots (two cotyledons).
- This classification leads to a vast diversity in forms, structures, and functions among angiosperms.

5. **Conclusion:**
- Given the classification and the characteristics of these groups, the most diverse group of plants on Earth is the Angiosperms.

**Final Answer:**
The most diverse group of plants on Earth are Angiosperms.

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