Which one of the following statements is not correct ?

Options

A. Offspring produced by the asexual reproduction are called clone.
B. Microscopic, motile asexual reproductive structures are called zoospores
C. In potato, banana and ginger, the plantlets arise from the internodes present in the modified stem.
D. Water hyacinth, growing in the standing water, drains oxygen from water that leads to the death of fishes.

Answer

To determine which statement is not correct, let's analyze each statement one by one.

1. **Statement 1**: "The offsprings produced by asexual reproduction are called clones."
- **Analysis**: This statement is true. Asexual reproduction results in offspring that are genetically identical to the parent organism, hence they are referred to as clones.

2. **Statement 2**: "Microscopic motile asexual reproductive structures are called zoospores."
- **Analysis**: This statement is also true. Zoospores are indeed microscopic, motile structures that are produced asexually and are capable of movement due to the presence of flagella.

3. **Statement 3**: "In potato, banana, and ginger, plantlets arise from the internode present in the modified stem."
- **Analysis**: This statement is incorrect. While potatoes produce plantlets from tubers (which are modified stems), bananas do not arise from internodes as they are not modified stems. Additionally, ginger is a modified root and does not have internodes. Therefore, this statement is false.

4. **Statement 4**: "Water hyacinth growing in standing water drains the oxygen from the water, leading to the death of fish."
- **Analysis**: This statement is true. Water hyacinth can proliferate in water bodies, consuming oxygen and leading to hypoxic conditions that can be detrimental to aquatic life, including fish.

**Conclusion**: The statement that is not correct is the third one regarding the plantlets arising from internodes in potato, banana, and ginger.

### Step-by-Step Solution:
1. **Identify the statements**: Read through the provided statements carefully.
2. **Analyze each statement**: Determine the truthfulness of each statement based on biological principles.
3. **Compare the statements**: Look for inconsistencies or inaccuracies in the statements.
4. **Conclude**: Identify which statement is false based on the analysis.