In a monoecious plant :

Options

A. Male and female sex organ are on different individuals
B. Male and female gametes are of two morphologically distinct types
C. Male and female sex organs are on the same individual
D. All the stamens are fused to form one unit

Answer

### Step-by-Step Solution:

1. **Understanding Monoecious Plants**:
- A monoecious plant is one that has both male and female reproductive structures (flowers) on the same individual. This means that a single plant can produce both male gametes (pollen) and female gametes (ovules).

2. **Definition of Terms**:
- **Monoecious**: Derived from Greek, meaning "one house". In these plants, male and female flowers are found on the same plant.
- **Dioecious**: This term means "two houses", referring to plants that have male and female flowers on separate individuals.

3. **Characteristics of Monoecious Plants**:
- Male and female flowers are present on the same plant.
- This arrangement allows for self-pollination as well as cross-pollination, increasing reproductive success.

4. **Comparison with Dioecious Plants**:
- In dioecious plants, male and female flowers are on different plants, which means that fertilization can only occur through cross-pollination.

5. **Conclusion**:
- Since the question asks about what happens in a monoecious plant, the key takeaway is that both male and female reproductive structures are present on the same individual, allowing for various forms of pollination.

### Final Answer:
In a monoecious plant, both male and female flowers are present on the same individual.

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