OCR GCSE Biology A · J247
Specification B4.1f · Paper 2 (Foundation), Paper 4 (Higher)
Revise: Abiotic and biotic factorsOver time, this can change a species’ population size or distribution and therefore alter the whole community.
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GCSE Biology · key term
The number of organisms of one species living in a particular area.
Used by OCR
Specification B4.1f · Paper 2 (Foundation), Paper 4 (Higher)
Revise: Abiotic and biotic factorsOver time, this can change a species’ population size or distribution and therefore alter the whole community.
When explaining an effect, link the factor to a biological process and then to a change in population size or distribution. For example: less light → less photosynthesis → less plant growth → less food for herbivores.
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