Evidence of Common Ancestry

Front

Homologous structures

Back

Structures in different species that are similar due to shared ancestry, indicating common descent.

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What does the presence of a pouch in certain mammals suggest?

Back

It suggests that these mammals are descended from a common ancestor.

Front

Similar DNA sequences indicate what?

Back

They indicate molecular structures that suggest a common ancestry among species.

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Why do certain limbs provide evidence of common ancestry?

Back

Because they have the same basic structure despite performing different functions.

Front

What is adaptation?

Back

A trait that helps organisms survive and reproduce in their environment.

Front

What are analogous structures?

Back

Structures that perform similar functions but do not share a common ancestry.

Front

What is embryological homology?

Back

Similarities in the embryonic development of different species that suggest a common ancestor.

Front

Define molecular homology.

Back

The study of similarities in the DNA sequences of different species, indicating evolutionary relationships.

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What is the significance of fossil evidence in common ancestry?

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Fossils provide physical evidence of past organisms and their evolutionary changes over time.

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What role does natural selection play in evolution?

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