AQA · Biology · 8461
GCSE Biology: Classification of living organisms
Inheritance, variation and evolution · AQA GCSE Biology (8461), specification point 4.6.4. Cards are generated from the exam board's own specification for "Classification of living organisms", and every card links back to the page it came from. Specification © AQA — used with attribution.
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Who developed the traditional system of classifying living things by structure and characteristics?
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Carl Linnaeus.
In the Linnaean system, the rank immediately below kingdom is ?.
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phylum
Which is the smallest, most specific rank in the Linnaean classification system?
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Species.
Which two Linnaean ranks make up an organism's binomial name?
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Genus and species (e.g. Homo sapiens).
Why were new models of classification proposed after Linnaeus?
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Improved microscopes revealed internal structures, and understanding of biochemical processes progressed.
Who developed the three-domain system of classification?
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Carl Woese.
What type of evidence led to the three-domain classification system?
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Chemical analysis (biochemical evidence).
The domain ? consists of primitive bacteria usually living in extreme environments.
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archaea
Which domain includes protists, fungi, plants and animals?
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Eukaryota.
What do evolutionary trees show?
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How scientists believe organisms are related to one another.
What data do scientists use to place extinct organisms on evolutionary trees?
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Fossil data (living organisms use current classification data).
What is the source of energy that passes through ecosystems?
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The Sun.
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