Question

Select the statement(s) that accurately describe how evidence for evolution is demonstrated through the relationship between the ancient Cladoselache (fossil pictured) and modern sharks

Modern sharks have changed gradually over the course of many years, developing traits that aid its survival.

The skeletons of modern sharks are similar to the fossils found of the Cladoselache.

The Cladoselache and modern sharks are unrelated and do not share common characteristics.

Modern sharks have a very similar body style to the fossil record of the Cladoselache.

Modern sharks evolved from a species other than the Cladoselache.

Answer 1

Correct statements: 1, 2, 4, and 5.

Brief justification:
- 1: The similarity between ancient Cladoselache and modern sharks supports gradual change (descent with modification) over long time periods.
- 2: Both show cartilaginous skeletons and comparable skeletal features, so their skeletal remains are similar in important ways.
- 4: The overall body plan (streamlined, fins, teeth) is very similar between Cladoselache fossils and modern sharks.
- 5: Cladoselache is an early shark-like relative, not the direct ancestor of modern sharks; modern sharks evolved from related species in that lineage.

Statement 3 is incorrect — Cladoselache and modern sharks are related and do share characteristics.