Ovules are classified on the basis of the position of micropyle with respect to funicle.

Answer

**Step-by-Step Solution:**

1. **Understanding Ovules**: Ovules are the structures in seed plants that develop into seeds after fertilization. They are crucial for reproduction in flowering plants.

2. **Classification Basis**: Ovules can be classified based on the position of the micropyle (the opening through which the pollen tube enters) in relation to the funicle (the stalk that attaches the ovule to the ovary).

3. **Types of Ovules**: There are six main types of ovules based on this classification:

- **Anatropos Ovule**:
- Description: The body of the ovule is inverted.
- Example: Found in plants like Prunus.
- Prevalence: This type is common, found in about 80% of angiosperms.

- **Hemotropous Ovule**:
- Description: The body of the ovule is half inverted.
- Example: Found in plants like Ranunculus.

- **Orthotropous Ovule**:
- Description: The body of the ovule is erect or straight.
- Example: Found in plants like Polygonum.

- **Amphitropous Ovule**:
- Description: The body of the ovule is curved, and the embryo sac is also curved.
- Example: Found in plants like the poppy.

- **Campylotropous Ovule**:
- Description: The body of the ovule is completely curved.
- Example: Found in plants like mustard.

- **Circinotropous Ovule**:
- Description: The funiculus wraps around the ovule.
- Example: Found in plants like Opuntia.

4. **Summary**: The classification of ovules based on the position of the micropyle relative to the funicle includes six types: Anatropos, Hemotropous, Orthotropous, Amphitropous, Campylotropous, and Circinotropous, each with distinct characteristics and examples.

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