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Scientists conducted an experiment to investigate the effectiveness of treating water from storage dams with UV radiation - HSC - SSCE Biology - Question 16 - 2021 - Paper 1
Question 16
Scientists conducted an experiment to investigate the effectiveness of treating water from storage dams with UV radiation. The experiment was conducted more than th... show full transcript
Worked Solution & Example Answer:Scientists conducted an experiment to investigate the effectiveness of treating water from storage dams with UV radiation - HSC - SSCE Biology - Question 16 - 2021 - Paper 1
Step 1
What conclusion can be drawn from the data obtained?
Answer
The data shows a clear trend: as the UV dose increases from 0 to 6 ml/cm², the average number of bacterial colonies counted decreases significantly from 365 to 2. This suggests that exposure to UV radiation effectively inhibits the reproduction of bacteria in the water sample. Therefore, the most valid conclusion is:
C. Exposure to UV inhibits reproduction of bacteria.