A Swim Bladder is not present in cartilaginous fishes. Also called a fish maw or gas bladder the swim bladder is a gas-filled bladder that allows many bony fish to control their buoyancy by filling or releasing gas form the bladder. This allows them to change bouyancy without wasting metabolic energy by swimming.
I think the answer is c but I looked it up and got this: system or thing used as an example to follow or imitate.
I believe it is a araebacteria
D. Frederick Taylor because I learned it in class today and I searched it up
