Chapher 13 CSecure https:/ pter 13 24 14844810 3 24 Part A-Interpreting the grap

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Chapher 13 CSecure https:/ pter 13 24 14844810 3 24 Part A-Interpreting the graph ulation of bacteria may avolve resistance to a drug over This graph shows the growth of a bacterial population and ater the introduction of an antibiotic, with some a beooming resistant to the antibiotio Which time point on the graph shows when the antibiotic was first added? Time Part B-Thinking oritically Which three statements may ermectly explain why the population axe Increaes after time poist C? The fow drug-esistant bac in the popuiason reoroduced, quichy jwnding to a large dnug nesistant pooulation Because the population grew more rapidy ater time pont C, the bacterie must have acoquired a second drug- resistance Bacteria that acquired a mutation that conferred drug- resstance had a growth advantage over non-eesistant bactera. The few drug-resistant bacteria t population reproduced, quickly leading to a large drug- reaistant popuiation the tme points C and D, drug-resistant bacteria were reproducing flaster than non-dnug resistant bacteria were dying The popufation increase just afer sime point Cindicates that antbiotic use was discontnued Subrmit Provide Feedbacik

Explanation / Answer

Answere :

Part A : The correct option is (B) because when population grow continuously (i.e A) then antibiotic is added to the population and population decline due to antibiotic (i.e. C) and then some member of population become resistance to antibiotic.

Part B : The correct statement about bacterial antibiotic resistance is :

1. The few drug-resistance bacteria in the population reproduced, quickly leading to a large drug-resistant population.

2. Between time-point C and D, drug-resistant bacteria were reproducing faster than non-drug resistant bacteria were dying.

3. Bacteria that acquired a mutation that conferred drug-resistance had a growth advantage over non-resistant bacteria.

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