Evolution

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What are Analogous Structures?

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Structures in different species that perform similar functions but have different evolutionary origins, such as the wings of birds and bats.

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What are Homologous Structures?

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Structures in different species that share a common ancestry, even if they have different functions, like the forelimbs of humans, cats, whales, and bats.

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What are Vestigial Structures?

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Body parts that have lost their original function through evolution, such as the human appendix.

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What does it mean when we say 'the more similar DNA, the closer related'?

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This refers to Molecular Homologies, which indicate that species with similar DNA sequences are more closely related.

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What evidence do embryos provide in the study of evolution?

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Embryos of different species show similarities, indicating that they share a common ancestor.

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What is the significance of fossil records in evolution?

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Fossil records provide evidence of how species have changed over time and how they are related to one another.

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What is Natural Selection?

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A process where organisms better adapted to their environment tend to survive and produce more offspring.

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What is the concept of Common Descent?

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The idea that all living organisms share a common ancestor from which they have evolved.

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What is Speciation?

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The process by which new species arise from existing species due to evolutionary changes.

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What is Genetic Drift?

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A mechanism of evolution that refers to random changes in the frequency of alleles in a population.