Homologous structures are structures found in one species that have the same basic anatomical structure and embryonic origin as those found in another species. If homologous structures are found on organisms of two different species, the species are related, even if only distantly. Which of the following structures are homologous and illustrate evidence of an evolutionary relationship?
A.
a bird's wing and a butterfly's wing
B.
a wasp's wing and a dolphin's flipper
C.
a catfish's fin and a bee's antenna
D.
a whale's flipper and a cat's leg