0654.B17.2.01 — Describe natural selection with reference to: 4 Describe the development of strains of (a). genetic variation within populations antibiotic-: past paper questions
Real questions on 0654.b17.2.01 — describe natural selection with reference to: 4 describe the development of strains of (a). genetic variation within populations antibiotic-
The newest 9 of 9 written questions. Open one to see it on the real paper.
- 0973/31 · May/June 2026 · Q4c(ii)[1]
One other reason the pupfish are endangered is the introduction of new non-native species of fish into the pupfish habitat. This is less of a problem where the water is at a high temperature or has an extreme pH. Suggest why.
See it on the paper → - 0973/42 · May/June 2024 · Q7c[2]
Explain why the development of antibiotic resistance in bacteria is an example of evolution.
See it on the paper → - 0973/32 · May/June 2023 · Q7c(ii)[3]
Circle the correct words shown in bold to complete the sentences to describe how lions may have developed sharp, pointed teeth. There was a range of different length teeth in the lion population. The lions with sharp, pointed teeth were better at catching and killing other animals for food. The lions without sharp, poi...
See it on the paper → - 0973/32 · May/June 2023 · Q7c(iii)[1]
State the name used to describe the process in (c)(ii).
See it on the paper → - 0973/41 · May/June 2023 · Q7a(i)[2]
Describe what happens to the bacteria during stage 1 in Fig. 7.1.
See it on the paper → - 0973/41 · May/June 2023 · Q7a(ii)[2]
Describe what happens to the bacteria during stage 2 in Fig. 7.1.
See it on the paper → - 0973/41 · May/June 2023 · Q7a(iii)[1]
State the name of the process that results in antibiotic resistance shown in Fig. 7.1.
See it on the paper → - 0973/41 · October/November 2020 · Q7b(i)[2]
Complete the definition of adaptation. Adaptation is the process, resulting from natural selection, by which populations become more suited to their over many
See it on the paper → - 0973/31 · May/June 2020 · Q7b[4]
Use words from the list to complete the sentences about natural selection. Each word may be used once, more than once or not at all. alleles cells react competition survive die variety Individuals in a population produce offspring. If there are not enough resources for all the individuals there is increased . Individua...
See it on the paper →
What examiners said
Most candidates understood that the antibiotic killed some of the bacteria. Most were able to state that the non-resistant bacteria died, or that only the resistant bacteria survived. A few thought that the bacteria that survived acquired resistance as it was the last one left.
— Examiner report, May/June 2023, 0973/41 Q7(a)(i) (Cambridge)
Although many candidates understood that the resistant bacteria reproduced, the idea of passing on the resistant gene/allele/DNA was not well expressed. A relatively common misconception was that the dead bacteria became resistant or got infected by the resistant bacteria.
— Examiner report, May/June 2023, 0973/41 Q7(a)(ii) (Cambridge)
Natural selection was correctly stated by some candidates. The most common incorrect answer was mutation.
— Examiner report, May/June 2023, 0973/41 Q7(a)(iii) (Cambridge)
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