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Emma Wayne A2 Biology
ACLC AQA Unit 4



Key Definitions
Ecosystem- all the organisms living in a particular area and all the non-living (abiotic) conditions e.g. a
freshwater ecosystem such as a lake.

Population- a group of interbreeding organisms in one species in a habitat e.g. population of green
woodpeckers…

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Emma Wayne A2 Biology
ACLC AQA Unit 4



Phenotype- actual appearance of an organisms, result of the genotype and environment.

Genotype- the genetic composition of an organism.

Allele- different forms of the same gene.

Gene- a section of DNA that codes for a polypeptide chain (protein).

Dominant- expresses itself even…

Comments

Josh Rigby

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Thanks, I'm sure this will help my revision run a lot smoother! :) 

Rebecca Rolph

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Thanks this was so helpful!! :)

KIRAN

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With both birth rate and death rate it's x1000 not x100 otherwise great :D

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