Final Answer:
1. Homologous body structures are body parts in different species that have similar anatomy because they were inherited from a common ancestor (e.g., human arm, bat wing, whale flipper).
2. (Diagram coloring and comparison would be done by student — not answerable here without visual input.)
3. The youngest rock layer is the top layer.
4. The oldest rock layer is the bottom layer.
5. Scientists compare fossils to see how organisms changed over time; similar fossils in nearby layers suggest gradual change, while very different ones suggest major changes or new species.
6. Comparing early development helps scientists see shared ancestry — for example, embryos of fish, chickens, and humans all have gill slits and tails early on, even if they disappear later.
7. If two species are closely related, their DNA sequences will be very similar — you’d expect only a few differences in the DNA code.
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Parent Tip: Review the logic above to help your child master the concept of evolution worksheets.
