Materials
Materials:
different kinds of doorknobs,
cotton swabs,
20 Petri dishes
35 grams of nutrient agar
1000 ml of water
Graduated cylinder
Water
Erlenmeyer flask
Magnetic stir rod
Materials:
different kinds of doorknobs,
cotton swabs,
20 Petri dishes
35 grams of nutrient agar
1000 ml of water
Graduated cylinder
Water
Erlenmeyer flask
Magnetic stir rod