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Summary Investigating Populations A level Biology

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Unit 5 - Energy transfers in and between organisms
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Year 1 Biology AQA A level notes. Achieved an A* in my final exam using these notes. They are based on the mark scheme requirements.

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Investigating populations
09 June 2023 13:17




- Abundance- the number of individuals of a species in a given space
- Small samples of habitat studied in detail- must be representative of the habitat as a w
conclusion drawn from the findings will be reliable


Quadrats



Point quadrat- horizontal bar supported by two legs. Ten holes are along set intervals- long p
dropped- each species that the pin touches is recorded




Frame quadrat- square frame divided by string or wire into equally sized subdivisions- can be
be more compact for storage and transport- quadrat placed in different locations within area
studied- abundance of each species within quadrat is recorded

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A Level Biology
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  • populations
  • quadrats
  • belt transect
  • line transect
  • a level biology

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