The Development and Understanding of Genetics and Evolution 2


  • 1) Insects can be preserved in amber, a thick and sticky liquid found in pine trees. The image below shows a fossil insect preserved in this way. How do fossils give evidence of evolution? 1 Marks



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  • 2) Suggest how this insect became fossilised in amber 2 Marks



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  • 3) How else can fossils be formed? 2 Marks


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  • 4) Scientists are looking at the evolutionary relationships between different genera of primates. The image below shows an evolutionary tree they have compiled so they can visualise this. What do all of the organisms in this tree share? 1 Marks



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  • 5) According to the tree, which genus is the most closely related to the Colobus genus? 1 Marks



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  • 6) Lemurs diverged from this tree 63 million years ago. Explain why scientists cannot be sure of the lifeforms around at this time 2 Marks


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  • 7) Many species belonging to the genus Tarsius are now extinct. Give two examples of how they may have become extinct 2 Marks


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  • 8) All of the organisms shown in the evolutionary tree will have evolved via a process known as natural selection, which was discovered by Charles Darwin. Outline the process of natural selection 5 Marks


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