In Pinus, the approximate time for fertilization after pollination is
(a) A four hours
(b) A few days
(c) A few weeks
(d) About a year

Options

A. A four hours
B. A few days
C. A few weeks
D. About a year.

Answer

To determine the approximate time for fertilization after pollination in Pinus, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Pollination in Pinus**:
- Pinus is a type of conifer, and the first step in its reproductive process is pollination. During pollination, male gametes (pollen) are transferred to the stigma of the female reproductive structure.

2. **Identifying the Timeframe for Fertilization**:
- After pollination occurs, fertilization does not happen immediately. It is essential to know how long it typically takes for fertilization to occur after the pollen has landed on the stigma.

3. **Researching the Fertilization Process**:
- In conifers like Pinus, the fertilization process is known to take a significant amount of time. Specifically, it is understood that fertilization occurs after a prolonged period.

4. **Evaluating the Options**:
- Now, we can evaluate the provided options:
- (a) Four hours - This is too short for fertilization to occur.
- (b) A few days - This is also too short for the fertilization process in Pinus.
- (c) A few weeks - This is still not long enough.
- (d) About a year - This aligns with the known reproductive cycle of Pinus.

5. **Conclusion**:
- Based on the information gathered, the correct answer is (d) about a year. This indicates that fertilization in Pinus occurs approximately one year after pollination.

### Final Answer:
(d) About a year