Biology A-Level
Births, deaths, immigration and emigration
What Births, deaths, immigration and emigration means in Biology A-Level, as defined for OCR.
Definition of Births, deaths, immigration and emigration
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Read the wording for your board, then hide it and explain Births, deaths, immigration and emigration in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: OCR
Births and immigration add individuals to a population, while deaths and emigration remove them, so change in population = (births + immigration) − (deaths + emigration).
Topics that use Births, deaths, immigration and emigration
- Populations and sustainability (OCR A-Level)
Related terms
- Biodiversity and ecosystem function
- Classifying management examples
- Conservation
- Ecosystem management techniques
- Effects of human activities on ecosystems
- interspecific competition
- Management strategies such as quotas and protected areas
- mutualism
Using Births, deaths, immigration and emigration in the exam
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