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A-LevelBiologySelection and evolutionFeb/Mar 2024Paper 4 Q56 Marks

Complete the following paragraphs using the most appropriate word or words. The theory of evolution describes a process that can lead to the formation of new species from pre-existing species over ____________________________. DNA sequence data of different species can be compared to show evolutionary relationships. Two species that have a more recent common ancestor share more ____________________________ in the DNA nucleotide sequences of their genomes than two species that are more distantly related. Mitochondrial DNA can also be used in the study of evolutionary relationships. Mitochondrial DNA is inherited only from the female gamete, and its nucleotide sequence is unaffected by ____________________________ during the production of gametes. DNA sequence data can be stored in large biological ____________________________, allowing faster comparison of the nucleotide sequences of genomes using computer software. DNA sequence data can also be used to predict the ____________________________ sequences of proteins produced by a species. A ____________________________ can be used to detect many different mRNA molecules at the same time in studies that compare gene expression between different species.

📋 Examiner Report & Trap Analysis

Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...

🎯 Mark Scheme Breakdown

Award 1 mark for identifying the correct principle. Award 1 mark for showing clear working. Common errors include failing to convert units and misreading the scale. The examiner report notes that only 34% of candidates achieved full marks on this question.

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About This A-Level Biology Question

Topic

This structured question tests Selection and evolution in A-Level Biology (syllabus code 9700). It is worth 6 marks.

Source

This question appeared in the Cambridge A-Level Biology Feb/Mar 2024 examination, Paper 4 Variant 2.

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