AQA A-Level Biology Revision #3

Try to be as specific to the spec as possible for the definition questions! These definitions are often asked for in exams so make sure you know them.

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Last updated: May 14, 2024

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First submitted	April 16, 2024
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Question	Answer
What is the naming system used for classification called?	The binominal naming system
What is an addition mutation?	One or more bases are added
Define species (exact AQA definition)	A group of similar organisims able to reproduce to give fertile offspring
What are mutagenic agents?	A factor that increases the rate of mutations
What is the term for the variety of living organisms in an area?	Biodiversity
Why does courtship behaviour prevent interbreeding?	It's species specific
What is the name of the study of the evolutionary history of groups of organisms?	Phylogeny
What is an inversion mutation?	A sequence of bases is reversed

Question	Answer
What is taxonomy?	The science of classification
List the groups of the phylogenetic hierarchy in order, starting with domain.	Domain, kingdom, phylum, class, order, family, genus, species
What is species richness?	A measure of the number of different species in a community
What are the two types of competition?	Interspecific and intraspecific competition
What is the term for all the populations of different species in a habitat?	Community
Why does a population sample have to be chosen at random?	To make sure the sample isn't biased / To ensure any variation isn't just due to chance
What is a translocation mutation?	A sequence of bases is moved from one location in the genome to another