Select correct features for Pinus.
(i) Monoecious plant (ii) Pinnate leaves
(iii) Sunken stomata (iv) Heterosporous

Options

A. I,ii & iv
B. I,iii & iv
C. ii,iii & iv
D. I,ii,iii & iv

Answer

To determine the correct features of the Pinus plant, we will analyze each of the provided characteristics one by one.

1. **Monoecious Plant**:
- Pinus is indeed a monoecious plant, meaning that both male and female reproductive structures (cones) are found on the same individual. This allows for the possibility of self-fertilization and increases reproductive efficiency.
- **Hint**: Remember that "monoecious" refers to having both male and female reproductive organs on the same plant.

2. **Pinnate Leaves**:
- This characteristic is not accurate for Pinus. Pinus has needle-like leaves, which are adapted for survival in harsh environments. Pinnate leaves are typically associated with other types of plants, particularly angiosperms.
- **Hint**: Think about the specific adaptations of Pinus leaves that help them conserve water and withstand cold temperatures.

3. **Sunken Stomata**:
- Pinus does have sunken stomata. This adaptation helps reduce water loss by minimizing the exposure of the stomata to air, which is crucial for survival in dry and windy conditions.
- **Hint**: Consider how sunken stomata function in plants to manage water loss effectively.

4. **Heterosporous**:
- Pinus is heterosporous, meaning it produces two different types of spores: microspores (male) and megaspores (female). This is a characteristic feature of gymnosperms.
- **Hint**: Recall that heterosporous plants produce two distinct types of spores, which is a key feature of their reproductive strategy.

### Summary of Correct Features for Pinus:
- (i) Monoecious plant: **Correct**
- (ii) Pinnate leaves: **Incorrect** (should be needle-like leaves)
- (iii) Sunken stomata: **Correct**
- (iv) Heterosporous: **Correct**

### Final Answer:
The correct features for Pinus are:
- (i) Monoecious plant
- (iii) Sunken stomata
- (iv) Heterosporous