Pollination is essential in angiosperm plants because

Options

A. It decreases the time required for fertilization
B. both of the male and female gametes are non-motile and they need to be brought together for fertilization
C. It is a time taking process
D. Both (a) and (b)

Answer

### Step-by-Step Solution:

1. **Understanding Pollination**:
- Pollination is the process where pollen grains are transferred from the male reproductive organ (anther) to the female reproductive organ (stigma) of a flower.

2. **Importance of Pollination**:
- Pollination is crucial because it enables fertilization, which is the fusion of male and female gametes. This is essential for the reproduction of angiosperms (flowering plants).

3. **Characteristics of Gametes in Angiosperms**:
- In angiosperms, both male (pollen) and female (ovule) gametes are non-motile. This means they cannot move on their own to meet for fertilization.

4. **Role of Pollination in Fertilization**:
- Since the gametes cannot move, pollination serves the critical function of bringing these non-motile gametes together, allowing fertilization to occur.

5. **Conclusion**:
- Therefore, pollination is essential in angiosperms because it facilitates the meeting of male and female gametes, which is necessary for fertilization. The correct answer to the question is option B: "Both male and female gametes are non-motile and they need to be brought together for fertilization."