Ovules in pinus are generally

Options

A. Anatropous with four integuments
B. Anatropous with one integument
C. Amphitropous with three integuments
D. Orthotropous with two integuments

Answer

To solve the question regarding the characteristics of ovules in Pinus, we can break down the information step by step:

### Step-by-Step Solution:

1. **Understanding Ovule Types**:
- Ovules can be classified based on their orientation and structure. The common types include anatropous, amphitropous, and orthotropous.

2. **Defining Anatropous Ovules**:
- Anatropous ovules are characterized by the micropyle (the opening through which the pollen tube enters) facing the placenta. This means that the ovule is inverted, and the funiculus (the stalk of the ovule) is bent back.

3. **Characteristics of Pinus Ovules**:
- In the case of Pinus, the ovules are specifically described as anatropous. This indicates that they have the micropyle facing the placenta, confirming their anatropous nature.

4. **Integument Structure**:
- The ovules of Pinus are also described as unitegmic, meaning they have a single integument. This integument can be further divided into layers, but there is only one integument present.

5. **Evaluating Options**:
- Option 1 states "anatropous with four integuments," which is incorrect as Pinus has only one integument.
- Option 2 states "anatropous with one integument," which is correct.
- Option 3 describes "amphitropous with two integuments," which does not apply to Pinus.
- Option 4 describes "orthotropous with two integuments," which is also incorrect for Pinus.

6. **Conclusion**:
- Based on the above analysis, the correct answer is that the ovules in Pinus are "anatropous with one integument."

### Final Answer:
The ovules in Pinus are generally **anatropous with one integument**.

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