Biology · Unity and diversity

A4.2 — Conservation of biodiversity

Biology · SL / HL · syllabus-mapped notes

1. A4.2.1

   Biodiversity as the variety of life in all its forms, levels and combinations

   Define biodiversity, at its three levels.

2. A4.2.2

   Comparisons between current number of species on Earth and past levels of biodiversity

   Compare the current number of species on Earth with past levels of biodiversity.

3. A4.2.3

   Causes of anthropogenic species extinction

   Explain the causes of the current, human-driven extinction of species, using case studies.

4. A4.2.4

   Causes of ecosystem loss

   Explain the human causes of ecosystem loss, using case studies.

5. A4.2.5

   Evidence for a biodiversity crisis

   Evaluate the evidence for a biodiversity crisis.

6. A4.2.6

   Causes of the current biodiversity crisis

   Explain the causes of the biodiversity crisis, from population growth down to the specific pressures.

7. A4.2.7

   Need for several approaches to conservation of biodiversity

   Explain why conserving biodiversity needs several different approaches.

8. A4.2.8

   Selection of evolutionarily distinct and globally endangered species for conservation prioritization in the EDGE of Existence programme

   Explain the rationale for prioritizing evolutionarily distinct and globally endangered species.