In a water culture experiment, the culture solution in a transparent beaker turned green. What precaution
should have been taken to prevent the culture solution from turning green?
Changing the culture solution regularly
Increasing the number of times the culture is aerated
Covering the transparent beaker with black cloth
Adding warm alcohol to bleach the green colour
Sterilizing the beaker in a hot oven before use
Correct answer is C
No explanation has been provided for this answer.