Continuity and Change D.10 Natural Selection (id: 453afb3d3)

本题目来源于试卷: Continuity and Change D.10 Natural Selection，类别为 IB生物学

[问答题]
The diagram shows how thz0 n8 js;-+6 dqt pqk:vjlp:ijq 6w1sye effect of growing24 arq4(oha6-sdlaz6 oo 1cjm bacteria with different antibiotics can be investigated. A study was conducted to test the degree of anti a( mzhd6 or64ac4oqlsa12o-j biotic resistance that bacteria from a hospital door handle had developed. Measurements of the zone of inhibition were taken every 3 days, for 15 days.



1.State which antibiotic is the least effective at preventing bacterial growth.

2.State two variables that must be controlled in this experiment, other than those already given.

3.1.Identify the anomalous result from the study.

3.2.Suggest how the anomalous result may have arisen.

4.Explain how natural selection can lead to antibiotic resistance in bacteria.

5.The researchers suggested that vancomycin could be used more extensively to treat bacterial infections. Discuss to what extent you agree with this.

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