Question

powernotes
main idea
evidence of common ancestry among
species comes from many sources.
fossils:
geography:
embryology:
anatomy:
analogous structures are not
evidence of a recent common
ancestor.
analogous structures:
homologous structures:
vestigial structures:

Explanation:

• Fossils: Show evolutionary changes over time.
• Geography: Species distribution patterns hint at common ancestry.
• Embryology: Similar embryonic development in related species.
• Anatomy - Analogous structures: Similar functions but different origins (e.g., wings of insects and birds).
• Anatomy - Homologous structures: Similar structures with common ancestry (e.g., human arm and bat wing).
• Anatomy - Vestigial structures: Useless remnants (e.g., appendix in humans).

Answer:

• Fossils: Document species' evolution over geological time.
• Geography: Isolated regions have unique species with shared traits.
• Embryology: Early embryos of diverse species look alike.
• Analogous structures: Wings of insects and birds (same function, different origin).
• Homologous structures: Forelimbs of humans, cats, whales (same bone structure, different use).
• Vestigial structures: Appendix in humans (no longer aids digestion).