Question

according to the cladogram, which characteristic was used to separate bony fish from amphibians? jaws cartilage bony skeleton lungs

Explanation:

To solve this, we analyze the cladogram. Bony fish and amphibians: check the traits. The cladogram shows "Lungs" as the trait after bony fish (bony skeleton) and before amphibians. So the characteristic separating them is lungs.

Answer:

lungs (the option with "lungs")