Homologous, Analogous and Vestigial Structures | Evidence for Evolution Worksheet | Comparative Anatomy Activity

Comparative anatomy is one of those topics that clicks best when students actually have to look at the bones themselves and figure out the relationships. This worksheet does exactly that, walking students through three types of anatomical evidence for evolution with structured observations, diagrams, and analysis questions that build toward genuine understanding.

Students start by color-coding homologous limb bones across six vertebrates, from humans to whales to bats, identifying how the same underlying structure serves completely different functions. They then examine analogous structures by comparing butterfly and bird wings and finish with vestigial structures using human anatomy and the cavefish as case studies. A final analysis section asks students to synthesize all three concepts and apply them to new examples.

What's covered:

• Homologous structures and what they reveal about common ancestry
• Analogous structures and convergent evolution
• Vestigial structures in humans and other animals
• Cavefish as a case study in evolutionary adaptation
• Comparing and defining all three structure types in students' own words

Students will be able to:

• Identify and compare homologous structures across vertebrate species
• Distinguish between homologous and analogous structures
• Explain what vestigial structures reveal about evolutionary history
• Analyze anatomical evidence and draw conclusions about evolutionary relationships

Includes:

• Printable PDF ready to use!
• 10 Pages (5x Worksheets + 5x Key)

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