Question

Question:
All vertebrate embryos have a tail and gill slits at some point during embryonic development. What does this suggest about vertebrates? (1 point)  

Responses:  

The embryos of these species require these structures to survive.  

These species have the exact same DNA sequence.  

These species evolved in similar environments.

These species share a common ancestor.

Answer 1

These species share a common ancestor.

Explanation: Similar embryonic structures (like tails and pharyngeal/gill slits) across vertebrates are evidence of homologous traits inherited from a common ancestor.