C4.1.2—Population size estimation Topic Practice
C4.1.2—Population size estimation Topic Practice

IB Biology syllabusBiology SL/HLFirst assessment 2025
Practise choosing and evaluating sampling methods that estimate organism numbers when whole populations cannot be counted directly.
How this is tested
- explain how quadrats or transects can estimate abundance across an area or distance
- suggest limitations when samples exclude some age groups, sexes or locations
- apply sample counts to estimate total population size in a larger habitat
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