Pollne pistil interactin is

Options

A. chemically mediated process
B. dynamic process
C. genetically controlled process
D. more than one option is correct

Answer

### Step-by-Step Text Solution:

1. **Understanding Pollen-Pistil Interaction**:
- Pollen-pistil interaction is a crucial aspect of sexual reproduction in flowering plants. It refers to the interaction between the pollen grain (male gamete) and the pistil (female reproductive part) of a flower.

2. **Process Overview**:
- When pollen grains are released from the anthers of the flower, they travel through the air and land on the stigma, which is the receptive surface of the pistil.

3. **Attachment Mechanism**:
- Upon landing on the stigma, the pollen grain adheres to it. This attachment is facilitated by chemical signals released from the stigma, which help in the binding of the pollen grain.

4. **Pollen Tube Formation**:
- After attachment, the pollen grain germinates and forms a pollen tube. This tube grows down through the style towards the ovary, where the ovules are located.

5. **Fertilization**:
- The pollen tube carries the male gamete to the ovule in the ovary, where fertilization occurs, leading to the formation of seeds.

6. **Conclusion**:
- The pollen-pistil interaction is primarily a **chemical-mediated process**. This means that the interaction is driven by specific chemical signals rather than being purely mechanical or genetically controlled.

### Final Answer:
The correct description of pollen-pistil interaction is that it is a **chemical-mediated process**.

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