In vivipary seed germinate while they are still atach to parent plant.the seedling then falls into the water(due to increase in its weight) nd develops root.

Germination of a Seed while the Fruit is Attached to the Parent Plant

Explanation:
When a seed germinates while the fruit is still attached to the parent plant, it is known as "vivipary". This phenomenon is observed in certain plant species and is considered as a form of asexual reproduction.

1. Vivipary:
Vivipary is a unique adaptation seen in certain plants where the seed germinates inside the fruit while it is still attached to the parent plant. In viviparous plants, the embryo begins to grow and develop before the seed is released from the fruit.

2. Advantages of Vivipary:
Vivipary offers several advantages to the plant:

- Increased chances of seed survival: By germinating within the fruit, the seed is protected and provided with nutrients from the parent plant, increasing its chances of survival.

- Facilitates dispersal: The seedlings that emerge from viviparous seeds are often well-developed and ready to establish themselves in the environment, enhancing their chances of successful dispersal.

- Adaptation to specific habitats: Vivipary is commonly observed in plants growing in habitats prone to flooding or high humidity. The ability to germinate while still attached to the parent plant allows the seedling to avoid being washed away or rotting in waterlogged conditions.

- Overcoming seed dormancy: In some cases, vivipary allows the seed to bypass a period of dormancy and start growing immediately, ensuring the plant's survival and growth in favorable conditions.

3. Examples of Viviparous Plants:
Some examples of viviparous plants include:

- Mangroves: Mangrove trees are well-known for their viviparous nature. The seeds germinate and develop into seedlings while still attached to the parent tree. Once the seedlings are mature enough, they drop into the surrounding water and establish themselves in the soil.

- Pineapple: The pineapple plant exhibits vivipary, where the seeds germinate and start growing within the fruit.

- Redwoods: Some species of redwood trees have viviparous seeds that germinate while still attached to the parent tree.

Conclusion:
Vivipary is a fascinating adaptation observed in certain plant species. It allows the seed to germinate and develop into a seedling while still attached to the parent plant, providing various advantages for the survival and dispersal of the plant species.