A4.2.8—EDGE of Existence programme Topic Practice
A4.2.8—EDGE of Existence programme Topic Practice

IB Biology syllabusBiology SL/HLFirst assessment 2025
Practise explaining how the EDGE of Existence programme prioritises species using extinction risk and evolutionary distinctiveness.
How this is tested
- describe why species with few close relatives may be prioritised for conservation action
- explain how EDGE links global endangerment with loss of evolutionary history
- interpret map or species evidence to justify inclusion in the EDGE programme
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