Explanation:

Salting is a common method of food preservation because it helps to kill bacteria. The process by which salt kills bacteria is known as plasmolysis. Plasmolysis occurs when salt is added to a bacterial cell, causing water to be drawn out of the cell by osmosis. The loss of water causes the bacterial cell to shrink and in some cases, the cell membrane to rupture, leading to cell death.

Heading: How does salt preserve food?

- Salt is added to food such as meat and pickles to help preserve it by killing bacteria.
- When salt is added to food, it creates a high concentration of salt outside the bacterial cell, causing water to move out of the cell by osmosis.
- The loss of water causes the bacterial cell to shrink, and in some cases, the cell membrane to rupture, leading to cell death.
- This process is known as plasmolysis and is the reason why salt is an effective preservative.

Heading: Why is plasmolysis an effective way to kill bacteria?

- Plasmolysis is an effective way to kill bacteria because it causes the bacterial cell to lose water and shrink.
- When the bacterial cell shrinks, it can no longer function properly, leading to cell death.
- Plasmolysis is also an effective way to kill bacteria because it targets the cell membrane, which is a critical part of the bacterial cell.
- By causing the cell membrane to rupture, plasmolysis can destroy the cell and prevent it from reproducing.

Heading: Other methods of food preservation

- In addition to salting, there are other methods of food preservation, including canning, freezing, and drying.
- Canning involves sealing food in airtight containers and heating them to high temperatures to kill bacteria.
- Freezing also helps to kill bacteria by slowing down their growth and reproduction.
- Drying removes moisture from food, making it difficult for bacteria to grow and reproduce.