The diagram shows different vertebrate embryos at the same stage of development - HSC - SSCE Biology - Question 2 - 2012 - Paper 1

Embryonic development stages in different vertebrates show notable similarities, indicating a common ancestor. The presence of similar structures among fish, amphibians, birds, and humans supports the concept of evolution. Option (C) is the most accurate response, as it suggests that these embryos exhibit structural similarities which point towards their shared evolutionary lineage.