What conclusion can the scientist in this scenario make from her results?
A) The test bacteria take more than 48 hours to grow in the laboratory when incubated at 37ᵒC.
B) All contaminated water contains high levels of lead and other heavy metals.
C) The amounts of lead used in the experiment killed the bacteria being tested.
D) All experiments should be repeated three times or more.
E) Lead-contaminated water does not contain any bacteria at all.
Correct Answer:
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