Amplify Evolutionary History End of Unit Assessment

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What is a common ancestor?

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A common ancestor is a species from which two or more different species have evolved. It is the most recent species from which all the species in a group are descended.

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What is speciation?

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Speciation is the process by which one population evolves into two or more different species, often due to environmental changes or genetic divergence.

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What is a descendant species?

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A descendant species is a species that has evolved from a common ancestor, representing a more recent evolutionary branch.

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How can we determine evolutionary relationships among species?

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Evolutionary relationships can be determined through phylogenetic trees, fossil records, and genetic analysis, which show how species are related through common ancestry.

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What does it mean for species to be closely related?

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Species are considered closely related if they share a more recent common ancestor compared to other species, indicating a closer evolutionary relationship.

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What is a paleontologist?

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A paleontologist is a scientist who studies fossils to understand the history of life on Earth and the evolution of species.

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What evidence supports the theory of evolution?

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Evidence for evolution includes fossil records, comparative anatomy, genetic similarities, and observed evolutionary changes in species.

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What is a phylogenetic tree?

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A phylogenetic tree is a diagram that represents the evolutionary relationships among various species, showing how they diverged from common ancestors.

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What role do mutations play in evolution?

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Mutations are changes in DNA that can lead to new traits in organisms. They are a primary source of genetic variation, which is essential for natural selection.

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What is natural selection?

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Natural selection is the process by which organisms better adapted to their environment tend to survive and produce more offspring, leading to evolutionary change.