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7th Grade Science
Evolution
3. Evidence
3.2 Comparative Biology, Anatomical and genetic evidence
Comparative Biology: Unlocking Evolution Through Anatomy and Genetics
Discover how scientists use body structures and DNA comparisons to reveal the evolutionary relationships connecting all living species on Earth.
What You'll Learn
Homologous structures share bone arrangements inherited from common ancestors.
Analogous structures perform similar functions but evolved completely independently.
Vestigial structures are non-functional remnants revealing an organism's evolutionary past.
DNA comparisons measure genetic similarity to determine evolutionary relationships between species.
What You'll Practice
1
Students identify homologous, analogous, and vestigial structures with examples.
2
Learners compare DNA sequences to determine closeness of evolutionary relationships.
3
Practice questions distinguish convergent evolution from true common ancestry evidence.
Why This Matters
Comparative biology equips students with the analytical tools to interpret anatomical and genetic evidence, forming the foundation for understanding evolution, genetics, and the interconnectedness of all life.
This Unit Includes
1 Video lesson
Practice exercises
Learning resources
Skills
Homologous Structures
Analogous Structures
Vestigial Structures
DNA Comparison
Convergent Evolution
FL Curriculum Aligned