Question

this picture shows a fossil of an ancient animal called asterotrygon. the fossil preserves the shape of asterotrygons body.
asterotrygon was a type of fish. it lived in lakes and gave birth to live young.
which traits did asterotrygon have? select the traits you can observe on the fossil.
spots on its skin
a wide tail fin
four legs
a long, thin tail

Explanation:

1. spots on its skin: Cannot be observed on the fossil, which only preserves the body shape, not fine skin details.
2. a wide tail fin: The fossil shows a broad, rounded body structure that is consistent with a wide tail fin.
3. four legs: Asterotrygon is a fish, and no leg structures are visible on the fossil.
4. a long, thin tail: A long, slender tail-like structure is clearly visible extending from the body in the fossil.

Answer:

• a wide tail fin
• a long, thin tail