Question

multiple choice question
what respiratory organ of terrestrial vertebrates is homologous with swim bladders of bony fishes?
o liver
o lungs
o gills
o heart

Explanation:

Homologous structures are derived from a common ancestor. Swim bladders in bony fishes and lungs in terrestrial vertebrates are both derived from an outpocketing of the gut in early vertebrates. The liver is a digestive - related organ, gills are the main respiratory organs in many aquatic organisms (but in a different evolutionary context here), and the heart is a circulatory organ.

Answer:

lungs