Which of the following are monoecious plants ?
(a) Sphagnum (b) Marchantia
(c) Funaria (d) Pinus

Options

A. Only a & b
B. Only b & c
C. a, c & d
D. Only c & d

Answer

To determine which of the given options are monoecious plants, we need to understand the definition of monoecious and dioecious plants.

### Step-by-Step Solution:

1. **Understand the Definitions**:
- **Monoecious plants**: These are plants that have both male and female reproductive structures (flowers) on the same individual plant.
- **Dioecious plants**: These are plants that have male and female reproductive structures on separate individual plants.

2. **Analyze Each Option**:
- **(a) Sphagnum**: This is a genus of mosses that is dioecious. Therefore, it does not qualify as monoecious.
- **(b) Marchantia**: This is a liverwort that is also dioecious. Hence, it does not qualify as monoecious.
- **(c) Funaria**: This is a type of moss that is monoecious, meaning it has both male and female reproductive structures on the same plant.
- **(d) Pinus**: This is a genus of coniferous trees that is also monoecious, having both male and female cones on the same tree.

3. **Conclusion**:
- From the analysis, we find that the monoecious plants among the options are **Funaria (C)** and **Pinus (D)**.

### Final Answer:
The correct answer is **C and D (Funaria and Pinus)**.

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