(Q4) LS - Evidence of Evolution

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What is evolution?

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Evolution is the process by which different kinds of living organisms develop and change over time through natural selection and genetic variation.

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What are fossils?

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Fossils are the preserved remains or traces of ancient organisms, often found in sedimentary rock.

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How do fossils provide evidence for evolution?

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Fossils show how life forms present today are different than those from the past, indicating changes in species over time.

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What are trace fossils?

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Trace fossils are geological records of biological activity, such as footprints, burrows, or feces, rather than the remains of the organism itself.

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What are vestigial structures?

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Vestigial structures are body parts that have lost their original function through evolution, such as the wings of flightless birds.

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What is natural selection?

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Natural selection is the process where organisms better adapted to their environment tend to survive and produce more offspring.

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What is a homologous structure?

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Homologous structures are body parts in different species that are similar in structure but may serve different functions, indicating a common ancestor.

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What is embryology?

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Embryology is the study of embryos and their development, which can provide evidence for evolution by showing similarities between different species in early stages.

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What is molecular biology?

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Molecular biology is the study of biological processes at the molecular level, including the interactions between DNA, RNA, and proteins, which can show evolutionary relationships.

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What is extinction?

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Extinction is the end of an organism or a group of organisms, often due to environmental changes or competition.