Term
| name three pieces of evidence for the claim that evolution happens. |
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Definition
| fossil records, homologous structures, speciation, artificial selection, convergent evolution, analogous structures, etc. |
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Term
| Why do fossils show evidence of evolution? |
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Definition
| show appearance of ancestors, and differences in ancestors in sequence expected by evolution. (eg. oldest fossils are prokaryotes suggesting they are earliest ancestor) |
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Term
| what is meant by 'half-life'? |
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Definition
| time it takes for half the parent isotope to decay into a daughter isotope. |
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Term
| What are vestigal organs? |
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Definition
| bone structures in animals that they do not use, but once did. (eg. a femur and pelvis in whales where once were legs) |
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Term
| what are homologous structures? |
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Definition
| similar characteristics in bone structures due to similar ancestry. |
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Term
| What is divergent evolution |
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Definition
| accumulation of small differences between groups which can lead to different species (eg. speciation) |
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Term
| What is adaptive radiation? |
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Definition
| when a small group of a species adapts to variations in habitats rapidly |
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Term
| what is meant by polymorphism? |
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Definition
| different versions of a species |
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Term
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Definition
| temporary changes in a population |
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Term
| Why is embryoic development evidence for evolution? |
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Definition
| closely related organisms go through similar stages in the embryoic stages indicating a common ancestor |
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Term
| what are analogous characteristics? |
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Definition
| structures serving similar functions in different species but are not derived from a similar ancestor. |
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Term
| Why are molecular structures evidence of evolution? |
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Definition
| DNA is universal, closely related species have similar DNA and proteins |
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