IB DP Biology Higher Level (2023 syllabus) · IB ib-bio-hl
A Unity and diversity
Written & reviewed by James Millett — Biology (Imperial College London), PGCE Science (University of Cambridge).
Practice questions on Unity and diversity
- Explain how sympatric speciation can occur within a single population occupying the same g… (4 marks, Explain)
- Explain why ice floats on liquid water and discuss the biological significance of this pro… (4 marks, Explain)
- Explain how hybridisation followed by polyploidy can result in the formation of a new plan… (4 marks, Explain)
- Explain how adaptive radiation can result in the formation of multiple new species from a … (4 marks, Explain)
- Explain how the surface tension of water arises from hydrogen bonding and outline one biol… (4 marks, Explain)
- Explain how hydrogen bonding between water molecules gives water a high specific heat capa… (4 marks, Explain)
- Explain how debt-for-nature swaps can contribute to the conservation of biodiversity in ec… (4 marks, Explain)
- Explain how complementary base pairing in DNA contributes to both the accurate storage and… (4 marks, Explain)
- Explain how the Convention on International Trade in Endangered Species of Wild Fauna and … (4 marks, Explain)
- Explain how the chemical properties of the nitrogenous bases in DNA result in the specific… (4 marks, Explain)
- Explain how the process of natural selection could have acted on protocells to give rise t… (4 marks, Explain)
- Explain how a virus with a lipid envelope acquires that envelope and why its presence affe… (4 marks, Explain)
- Explain how viruses can be transmitted between hosts, with reference to at least two disti… (4 marks, Explain)
- Explain why viruses are not classified within any of the recognised kingdoms or domains of… (4 marks, Explain)
- Explain how the cohesive and adhesive properties of water are essential for its transport … (4 marks, Explain)
- Explain how habitat fragmentation reduces biodiversity, referring to the effects on popula… (4 marks, Explain)
- Explain how the establishment of marine protected areas (MPAs) contributes to the conserva… (4 marks, Explain)
- Explain how keystone species contribute to maintaining biodiversity within an ecosystem, a… (4 marks, Explain)
- Explain how reproductive isolation between two allopatric populations can arise and ultima… (4 marks, Explain)
- Explain how convergent evolution provides evidence that natural selection, rather than cha… (4 marks, Explain)
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