A swim bladder is a gas-filled sac that helps fish maintain buoyancy. The evolution of the swim bladder from the air-breathing organ (a simple lung) of an ancestral fish is an example of a. exaptation. b. changes in Hox gene expression. c. paedomorphosis. d. adaptive radiation.

Video transcript

Hello everyone here We have a question asking us which of the following examples illustrates exaltation. A evolution of birds feathers for mating purposes, which originally functions as thermal insulators. Be loss of I function for certain fish species living in a dark cave. See developmental development of traits for antibiotic resistance by certain bacterial species or the development of wing type seat of seeds among plants for enhanced dispersal rate. So what is exact ation expectation is a trade feature or structure of an organism that takes on a function when none previously existed or that differs from its original function. So our answer here is a evolution of birds feathers for mating purposes, which originally function as thermal insulators. Thank you for watching. Bye.