IB DP Biology Standard Level (2023 syllabus) · IB ib-bio-sl
D Continuity and change
Written & reviewed by James Millett — Biology (Imperial College London), PGCE Science (University of Cambridge).
Practice questions on Continuity and change
- Explain how the body responds to a rise in blood osmolarity, such as that caused by excess… (4 marks, Explain)
- Explain how changes in the distribution of biomes due to climate change could reduce the a… (4 marks, Explain)
- Explain how changes in sea ice coverage in polar regions can create a positive feedback lo… (4 marks, Explain)
- Explain how rising atmospheric carbon dioxide concentrations contribute to ocean acidifica… (4 marks, Explain)
- Explain how multiple alleles at a single gene locus can produce more than two phenotypes i… (4 marks, Explain)
- Explain how the alternation of generations in plants, involving both a sporophyte and a ga… (4 marks, Explain)
- Explain why a plant cell that has been placed in a concentrated salt solution will eventua… (4 marks, Explain)
- Explain how differences in water potential between the soil, root hair cells, and the xyle… (4 marks, Explain)
- Explain how transcription produces a messenger RNA (mRNA) molecule from a DNA template str… (4 marks, Explain)
- Explain how sex-linked inheritance can result in a phenotypic ratio that differs between m… (4 marks, Explain)
- Explain the role of ribosomes in translation during protein synthesis. (4 marks, Explain)
- Explain the role of transfer RNA (tRNA) in translation. (4 marks, Explain)
- Explain why sexual reproduction generates greater genetic variation in offspring than asex… (4 marks, Explain)
- Explain the role of complementary base pairing in ensuring accurate DNA replication. (4 marks, Explain)
- Explain why DNA replication is described as semi-conservative. (4 marks, Explain)
- Explain the roles of helicase and DNA polymerase during DNA replication. (4 marks, Explain)
- Explain why DNA replication must occur before mitosis and describe one consequence if repl… (4 marks, Explain)
- Explain how the water potential of a plant cell changes as the cell absorbs water by osmos… (4 marks, Explain)
- Explain how a eukaryotic cell ensures that a polypeptide is only produced from the coding … (4 marks, Explain)
- Explain why DNA replication proceeds continuously on one template strand but discontinuous… (4 marks, Explain)
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