Which of the following statements is not correct?

Options

A. Some reptiles have also been reported as pollinators in some plant species
B. Pollen grains of may species can germinate on the stigma of flower but only one pollen tube of the same species grows into the style
C. Insects that consume pollen or nectar without bringing about pollination are called pollenectar robbers
D. Pollen germination and pollen tube growth are guided by chemical components of interacting with those of the pistil

Answer

To determine which statement is not correct, we will analyze each option provided in the question step by step.

### Step-by-Step Solution:

1. **Evaluate Option 1**:
- **Statement**: "Some reptiles have also been reported as pollinators in some plant species."
- **Analysis**: This statement is true. Certain reptiles, such as snakes and garden lizards, have been observed to act as pollinators. The term "Ophiophilia" refers to pollination by snakes.
- **Conclusion**: This statement is correct.

2. **Evaluate Option 2**:
- **Statement**: "Pollen grain may germinate on the stigma of the flower, but only one pollen tube of the same species grows into the style."
- **Analysis**: This statement is misleading. While it is true that pollen grains germinate on the stigma, multiple pollen tubes can grow from the same pollen grain, and sometimes multiple pollen grains can also contribute to the growth of pollen tubes into the style. Therefore, the assertion that only one pollen tube grows into the style is incorrect.
- **Conclusion**: This statement is not correct.

3. **Evaluate Option 3**:
- **Statement**: "Insects that consume pollen or nectar without bringing about pollination are called as pollen nectar robbers."
- **Analysis**: This statement is true. Insects that take nectar or pollen without aiding in pollination are indeed referred to as nectar robbers or pollen robbers.
- **Conclusion**: This statement is correct.

4. **Evaluate Option 4**:
- **Statement**: "Pollen germination and pollen tube growth are guided by chemical components of the pistil interacting with those of the pollen grain."
- **Analysis**: This statement is also true. The interaction between the chemical signals from the pistil and the pollen grain is crucial for the successful germination and growth of the pollen tube.
- **Conclusion**: This statement is correct.

### Final Conclusion:
After analyzing all the statements, we find that **Option 2** is the statement that is not correct.