Analogous structures
Definition
Analogous structures are body parts in different species that have similar functions but evolved separately, not from a common ancestor. They arise due to convergent evolution where different organisms adapt similarly to comparable environments.
5 Must Know Facts For Your Next Test
- Analogous structures result from convergent evolution.
- They exhibit similar functionality despite having different anatomical origins.
- An example of analogous structures is the wings of birds and insects.
- They do not indicate a close evolutionary relationship between species.
- Analogous structures differ from homologous structures, which have a common ancestral origin.
Review Questions
- What is the primary difference between analogous and homologous structures?
- Can you name an example of analogous structures and explain why they are considered analogous?
- How do analogous structures support the concept of convergent evolution?
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Related terms
Homologous Structures: Structures in different species with a common ancestral origin, even if their functions differ.
Convergent Evolution: The process by which unrelated organisms independently evolve similarities when adapting to similar environments.
Divergent Evolution: The accumulation of differences between closely related populations leading to speciation.
