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Classification is the organisation of living organisms into groups.
Species are a group of similar organisms that can breed together to
produce fertile offspring. The system devised for naming species is a
binomial system as the organisms are identified by two names. These
names are based on Greek or…

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Homologous features have the same function and are evolved from a
common ancestor.
A difficulty in defining species arises when we take into account these
1. For extinct organisms there is no information on their reproduction &
structural information is limited.
2. Reproductive behaviour may not be easily observable.…


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