It is not possible to grow bacteria in Petri dishes with only water as bacteria require a nutrient source to grow. Water alone does not provide the necessary nutrients for bacteria to multiply and thrive. Bacteria need a source of simple sugars, amino acids, vitamins, and minerals to grow. Some common nutrient sources used to grow bacteria in Petri dishes include agar, agarose, and broth. These nutrient sources provide the necessary nutrients for bacteria to grow and form colonies in Petri dishes.
