What four thing do bacteria need to grow and multiply?

1. Water: Bacteria require water to transport nutrients into and out of the cell, as well as to maintain cell structure and function.

2. Oxygen: Most bacteria require oxygen to perform aerobic respiration, which is the process by which bacteria convert glucose into energy.

3. Nutrients: Bacteria require nutrients, such as carbon, nitrogen, phosphorus, and sulfur, to build new cells and to carry out their metabolic activities.

4. Optimal Temperature: Bacteria grow best at a specific temperature range. Most bacteria grow best at temperatures between 20 and 37 degrees Celsius (68 and 98.6 degrees Fahrenheit).