Anisophylly is

Options

A. Different types of leaves on the same plant
B. Unequal sized opposite leaves
C. Presence of lobed and entire leaves
D. Leaves with unequal sized basal and terminal leaflets.

Answer

**Step-by-Step Solution:**

1. **Understanding Anisophylly**: Anisophylly refers to a condition in plants where the leaves on the same plant exhibit different sizes and forms. This phenomenon is a result of dorsiventral symmetry in the plant's shoot system.

2. **Analyzing the Options**:
- **Option A**: "Different types of leaves on the same plant" - This describes heterophyllous plants, where leaves are distinctly different in shape and size. Thus, this option is incorrect.
- **Option B**: "Unequal sized opposite leaves" - This aligns with the definition of anisophylly, as it indicates that the leaves are of different sizes while being positioned oppositely on the stem. This option is correct.
- **Option C**: "Presence of lobed and entire leaves" - This does not specifically describe anisophylly and is therefore incorrect.
- **Option D**: "Leaves with unequal sized basal and terminal leaflets" - While this might suggest some variation, it does not accurately define anisophylly and is incorrect.

3. **Conclusion**: After analyzing all options, the correct answer to the question "Anisophylly is" is **Option B: Unequal sized opposite leaves**.

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