Question 43
Microorganisms and HealthWhich of the ways of controlling bilharzia can result in pollution?
- A.Clearing water weeds on which the snails feed
- B.Treating infected people with drugs
- C.Preventing contamination of water by infected urine and faeces
- D.Applying chemical to kill the snails
Show the answer and explanation
Answer: D (Applying chemical to kill the snails)
Explanation
Chemicals (molluscicides) poured into water to kill snails also poison the water and other living things.