Edexcel IGCSE Biology Analyse Data and Conclusions

Edexcel IGCSE Biology Analyse Data and Conclusions
Edexcel IGCSE Biology syllabusBiology 4BI1Issue 3 (2024)

Practise Edexcel IGCSE Biology analysing data and drawing evidence-based conclusions by using graph and table results to support biological claims.

How this is tested

  • Draw conclusions from data, such as heart disease risk changing with age and sex.
  • Discuss graph evidence about sperm movement, sweating, pH or treatment outcomes.
  • Balance conclusions with limitations such as sample size, species used or missing patient data.

Question 5(b)(ii)

[Maximum number: 5]

The diagram shows the human female reproductive system with some structures labelled.

Figure for Question 5(b)(ii) — Edexcel IGCSE Biology

For fertilisation to occur, a sperm needs to reach an ovum.

Scientists are developing a contraceptive drug to reduce fertility.

The drug is tested on 25 male mice.
Graph 1 shows the effect that different concentrations of the drug have on the mean concentration of sperm in semen.

Graph 2 shows the effect that different concentrations of the drug have on the percentage of sperm that can move.

Graph 1

Graph 1

Figure for Question 5(b)(ii) — Edexcel IGCSE Biology

Graph 2

The scientists conclude that the drug could be used as a contraceptive to reduce fertility in humans.

Discuss the scientists' conclusion.
Use information in the graphs and your own knowledge to support your answer.