Which of the following is monoecious

Options

A. Pinus
B. Date palm
C. Marchantia
D. Cycas

Answer

To determine which of the following plants is monoecious, we need to understand the definition of monoecious plants and examine the options provided: Pinus, Date palm, Marchantia, and Cycus.

### Step-by-Step Solution:

1. **Define Monoecious Plants**:
- Monoecious plants are those that have both male and female reproductive organs on the same individual. This means that a single plant can produce both types of gametes.

2. **Analyze Each Option**:
- **Pinus**: This is a genus of coniferous trees. In Pinus, both male and female cones are found on the same tree, which makes it monoecious.
- **Date Palm**: Date palms are dioecious, meaning that individual plants are either male or female, so they cannot produce both types of gametes.
- **Marchantia**: This is a liverwort, which is also dioecious, having separate male and female plants.
- **Cycus**: Cycus plants are also dioecious, with male and female reproductive structures on separate plants.

3. **Conclusion**:
- Among the options provided, **Pinus** is the only monoecious plant because it has both male and female cones on the same individual.

### Final Answer:
**Pinus** is the monoecious plant among the options given.

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