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Topic 8- Classification
Taxonomy is a method of classifying living organisms. It can be analogous (based on function) e.g. all flying animals such as
birds, bats and insects; or homologous based on features that share the same underlying structure) e.g. vertebrates. We use
the homologous system because it shows…

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The more closely related the organism is the more similar the genes, therefore the DNA base sequence is more similar and
the amino acid sequence of the proteins is more similar.

Species Different number of amino
acids in the -haemoglobin
Human 0
Gorilla 1
Gibbon 2
Rhesus Monkey 8…


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