Biology, 24.02.2022 05:50, roseemariehunter12

A swim bladder is a gas-filled sac that helps fish maintain buoyancy. The evolution of the swim bladder from the airbreathing organ (a simple lung) of an ancestral fish is an example of

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A swim bladder is a gas-filled sac that helps fish maintain buoyancy. The evolution of the swim blad...