In which one pair, both the plants can be vegetatively propagated by leaf pieces ?

Options

A. Bryophyllum and Kalanchoe
B. Chryansanthemum and Agave
C. Agave and Dioscorea
D. Bryophyllum and Asparagus

Answer

To determine which pair of plants can be vegetatively propagated by leaf pieces, we will analyze the options provided in the question.

### Step-by-Step Solution:

1. **Understanding Vegetative Propagation**:
- Vegetative propagation is a form of asexual reproduction where new plants grow from parts of the parent plant, such as leaves, stems, or roots.

2. **Analyzing the First Pair: Bryophyllum and Calenco**:
- **Bryophyllum**: This plant can propagate vegetatively through its leaves. The leaves of Bryophyllum develop small buds at their edges, which can grow into new plants when they fall off and take root in the soil.
- **Calenco**: Similar to Bryophyllum, Calenco also propagates through leaf pieces. When leaf segments are planted, they can develop roots and grow into new plants.

3. **Analyzing the Second Pair: Chrysanthemum and Agave**:
- **Chrysanthemum**: This plant primarily propagates through its roots, not through leaf pieces.
- **Agave**: Agave propagates through bulbils, which are small bulbs that develop at the leaf axils, rather than through leaf pieces.

4. **Analyzing the Third Pair: Agave and Dioscorea**:
- **Agave**: As mentioned, it propagates through bulbils.
- **Dioscorea**: This plant propagates through stem cuttings, not through leaves.

5. **Analyzing the Fourth Pair: Bryophyllum and Asparagus**:
- **Bryophyllum**: Can propagate through leaves.
- **Asparagus**: This plant propagates through its stems and not through leaves.

6. **Conclusion**:
- The only pair where both plants can be vegetatively propagated by leaf pieces is **Bryophyllum and Calenco**.

### Final Answer:
The correct pair is **Bryophyllum and Calenco**.