Which evidence supports the theory that fish and mammals evolved from the same ancestor?
1. Molecular evidence: Studies have shown that fish and mammals share similar genetic sequences, indicating a common ancestry.
2. Fossil evidence: Fossil records show transitional forms between fish and mammals, such as Tiktaalik, which had characteristics of both fish and early tetrapods.
3. Developmental evidence: Both fish and mammals have similarities in their embryonic development, such as the presence of gill slits in early embryos, which suggests a shared evolutionary history.
4. Anatomical evidence: Fish and mammals have certain anatomical similarities, such as the presence of a backbone, indicating a common ancestor with a vertebrate lineage.
5. Behavior evidence: Both fish and mammals exhibit similar behaviors, such as seeking shelter, mating rituals, and feeding habits, which may suggest a shared evolutionary history.