How old does a fossil have to be in order to be considered a fossil?
Living fossil is an informal term for the any living species (or clade) of organism which appears to be the same as a species otherwise only known from fossils and which has no close living relatives.
Answered by Monica G. -
About Species
Species are able to reproduce, and is also the most specific major classification in biology. Living things that are very alike are still considered separate species if they cannot mate and produce fertile offspring.
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