Mississippi Science ZOO.9.1
The Standard
- ZOO.9
- Students will understand the structure and function of phylum Chordata, class Aves, and how they demonstrate the characteristics of living things.
Trace the evolutionary history of modern birds beginning with the theropods. Relate how today’s birds have adapted to changing environments.
2026 Mississippi College- and Career-Readiness Standards for Science · Phylum Chordata, Class Aves
Teacher's field guide
What This Standard Means
What Students Need to Do
- Students use fossils and shared traits to trace modern birds back to feathered theropod dinosaurs. They explain how changes in food or habitat can make inherited traits more common over generations.
What Mastery Looks Like
- A student uses feathers, wishbones, and hollow bones as evidence for the dinosaur-bird link. They place Archaeopteryx on an early bird branch, not as a proven direct ancestor. They can explain why a change in food might favor a different beak shape.
Common Misconceptions
- Students may think birds evolved from pterosaurs or that all dinosaurs went extinct. They may assume an individual bird changes its beak shape when its food source changes.
How to Assess It
- Exit ticket: Sketch a branching tree that includes a feathered theropod, Archaeopteryx, and a modern bird. Label one shared trait, then explain how an inherited beak trait could help birds when food changes.
Lesson moves
Ways to Teach It
Give pairs printed fossil cards showing a feathered theropod, Archaeopteryx, and a sparrow; have them build a branching tree from shared traits.
Ask students to write: If a marsh becomes dry grassland, which inherited beak trait would help birds eat grass seeds, and why?
Play a match-up game with hooked beak, webbed feet, and long legs cards, plus food and habitat cards; students justify each match.
Compare photos of a duck feeding in water and a hawk catching prey; students explain how each beak fits its food.
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Printable ZOO.9.1 Worksheet
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Related Standards
- ZOO.9.7
Explain the importance of the evolution of flight and feathers, including the morphological and physiological adaptations needed to sustain flight.
- BIO.4.2
Evaluate empirical evidence of common ancestry and biological evolution, including comparative anatomy (e.g., homologous structures and embryological similariti...
- ZOO.9.2
Describe the fossil evidence that indicates that birds evolved from two-legged dinosaurs called theropods.
- ZOO.9.9
Demonstrate how different adaptations of the bird beak and feet allow them to feed and survive in different environments.
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