Jaws provide a powerful adaptive advantage to vertebrates because they greatly expand the range of available food sources. They also enhance the predatory ability of vertebrates, such as sharks, that are members of this early, jawed class.
Jaws allow them to bite food and break it into smaller pieces. This is a big adaptive advantage because it greatly expands the range of food sources they can consume. Jaws also make cartilaginous fish excellent predators.
Do all fish have teeth?
All fish have teeth. Specific types of swimmers—like goldfish—hide their pearly whites near the back of their throats. Similar to shark teeth, goldfish lose and replace teeth throughout their lifetime.
What kind of fish was Jaws?
Prehistoric armoured fishes called placoderms were the first fishes to have jaws. They arose some time in the Silurian Period, about 440 million years ago, to become the most abundant and diverse fishes of their day.
What is jaw Suspensorium?
Jaw suspension means attachment of the lower jaw with the upper jaw or the skull for efficient biting and chewing. … Pterygoqadrate makes the upper jaw and meckel’s cartilage makes lower jaw and they are highly flexible.
Why did jaws evolve in fish?
A jaw allowed vertebrates to exploit a wide range of food and engage in predation and defense. Jawed vertebrates arose from non-jawed vertebrates that had a pharyngeal gill apparatus composed of gill bars and slits. Anterior gill bars evolved into the jaw, which supports structures in vertebrates.