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Summary Edexcel A'level Biology UNIT 4

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BIOLOGY UNIT – 4 (MODEL QUESTIONS)
Created By Devjyoti Dey Mugdho


Compare and contrast the structure of chloroplast with the
structure of a mitochondrion




Definitions
Habitat –
Population -
Niche –
Anthropogenic Climate Change -

,Biodiversity – the measure of the number of different species
that also represents the genetic diversity within a species.
Evaluate the use of body temperature of a corpse to
estimate the time of death




Suggest ways to reduce the effects of anthropogenic
climate change

, Explain how products of the light-independent reaction
become NPP below ground




Explain why both T helper and T killer cells both required in
the immune response to a virus




Definitions
Biomass -
Action Spectrum -

, Distinguish between abundance and distribution
Abundance – the relative representation of the number of a
particular species amongst the other species
Distribution – where the organism is found/located


Differences between nuclear and mtDNA




Explain how forensic entomology can indicate that a body has
been removed from the place of death




Explain the role of gut flora in protecting body from infection

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School year
2
Uploaded on
July 31, 2025
Number of pages
54
Written in
2024/2025
Type
Summary
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