Boojho had the following parts of a rose plant – a leaf, roots, a branch, a flower, a bud and pollen grains. Which of them can be used to grow a new rose plant?

Options

A. a leaf
B. a branch
C. a flower
D. stem

Answer

To determine which parts of a rose plant can be used to grow a new rose plant, let's analyze each part mentioned: a leaf, roots, a branch, a flower, a bud, and pollen grains.

### Step-by-Step Solution:

1. **Understanding Plant Propagation**:
- Plants can reproduce in various ways, including sexual reproduction (using seeds) and asexual reproduction (using parts of the plant).
- Asexual reproduction can occur through methods like vegetative propagation, where parts of the plant such as stems, leaves, or roots can grow into new plants.

2. **Analyzing Each Part**:
- **Leaf**: Generally, leaves do not have the capability to grow into a new plant on their own.
- **Roots**: While roots are essential for a plant's growth, they cannot independently grow into a new plant without the stem.
- **Branch**: A branch can be used for vegetative propagation. If a branch (or cutting) is taken from the rose plant and placed in nutrient-rich soil, it can develop roots and grow into a new rose plant.
- **Flower**: Flowers are reproductive structures and do not grow into new plants.
- **Bud**: A bud can develop into a flower or a new shoot, but it is not typically used alone for propagation.
- **Pollen Grains**: Pollen is involved in the sexual reproduction of plants and does not grow into a new plant.

3. **Conclusion**:
- The only part that can be used to grow a new rose plant is the **branch**. By taking a cutting from the branch and planting it in suitable soil, a new rose plant can be propagated.

### Final Answer:
The part of the rose plant that can be used to grow a new rose plant is the **branch**.