The phylogenetic tree below shows the evolutionary relationship between seven species of cichlid fish.
- Fossils of species of fish are more likely to be found than fossils of land-dwelling animals.
- Explain why this is the case with reference to two conditions required for the fossilisation of an organism. (2 marks)
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- A group of scientists stated that a particular fossilised fish was 5000 years old.
- Outline a dating technique that could have been used by the scientists to determine the age of the fossil. (2 marks)
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