Which one of the following statements is not correct regarding vivipary?

Options

A. Seeds germinate within the fruit while still attached to the mother plant
B. It usually occurs under highly saline conditions
C. It occurs in the mangrove plants
D. It involves a dormancy period for the seed

Answer

To determine which statement is not correct regarding vivipary, let's analyze each option step by step.

### Step-by-Step Solution:

1. **Understanding Vivipary**:
- Vivipary is a phenomenon where seeds or embryos begin to develop while still attached to the parent plant. This means that germination occurs before the seeds detach from the mother plant.

2. **Analyzing the Options**:
- **Option 1**: "Seeds germinate within the fruit while still attached to the mother plant."
- This statement is correct as it aligns with the definition of vivipary.

- **Option 2**: "It usually occurs under highly saline conditions."
- This statement is also correct. Vivipary is commonly observed in mangrove plants, which thrive in saline environments.

- **Option 3**: "It occurs in the mangrove plant."
- This statement is correct as mangrove plants are well-known for exhibiting vivipary.

- **Option 4**: "It involves a dormancy period for the seed."
- This statement is incorrect. Vivipary does not involve a dormancy period for the seeds. In fact, the seeds germinate while still attached to the parent plant, indicating that they do not undergo dormancy.

3. **Conclusion**:
- The statement that is not correct regarding vivipary is **Option 4**: "It involves a dormancy period for the seed."

### Final Answer:
**Option 4: It involves a dormancy period for the seed.**

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