Which of the following parts of the flower are incorrectly matched?

Options

A. Microsporophyll - stamen
B. Microspore - pollen grain
C. Megasporophyll - carpel
D. Megaspore - ovule

Answer

To solve the question, "Which of the following parts of the flower are incorrectly matched?", we will analyze each option provided:

1. **Microsporophyll - Stamen**:
- Microsporophyll refers to the male reproductive part of the flower, which develops into the stamen.
- Therefore, this match is correct.

2. **Microspore - Pollen Grain**:
- Microspores are the male gametes produced in the anthers of the stamen and are indeed known as pollen grains.
- Thus, this match is also correct.

3. **Megasporophyll - Carpel**:
- Megasporophyll refers to the female reproductive part of the flower, which develops into the carpel.
- This match is correct as well.

4. **Megaspore - Ovule**:
- Megaspores are produced in the ovule, but they are not synonymous with ovules. Instead, the ovule is the structure that contains the megasporangium, which produces megaspores.
- Therefore, this match is incorrect.

Based on the analysis, the incorrectly matched pair is **Megaspore - Ovule**.

### Final Answer:
The incorrectly matched part of the flower is **Megaspore - Ovule**.