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Jaws are believed to have evolved from the?

Jaws are believed to have evolved from the first pair of gill arches in early fish species. Over time, these arches transformed into the complex structures we see in modern vertebrates, allowing for more efficient feeding and predation. This adaptation played a key role in the evolutionary success of jawed vertebrates.


Why is the number of pharyngeal gill slits in sharks fewer than that of other marine fishes?

"Jaws are believed to have evolved from the first pair of gill arches of agnathans. The second pair of gill arches became support structures for the jaws." - Biology Laboratory Manual, Ninth Edition Darrel S. Vodopich and Randy MooreSo, sharks have fewer gill slits because the first two pairs became the jaw and the structural support for the jaw.


Why did jaws evolve invertebrates?

Jaws evolved from the gill bars on fish.


What evolutionary development do scientists think occurred in the Cambrian period that gave rise to more complex fish?

They theorize that during this period the first of three gill arches on a jawless fish evolved into the first jaws.


Do crocodile have any rudimentary gills because they were evolved by a fish named tiktaalik?

Regardless of the presumed relationship to tiktaalik, you will find gill slits to be present in all vertebrates. In reptiles, the slits would not persist past the embryonic stage but, the crocodiles' jaws were derived from the gill arches. Look up "Ontogeny recapitulates phylogeny."


What feature of agnathans evolved into jaws in early jawed fishes?

Gill supports


What period of history do scientists think jaws developed?

Scientists believe that jaws likely developed during the Silurian period, around 430 million years ago, from modifications of the anterior gill arches of early fish-like organisms. This evolutionary development allowed for more efficient feeding and predation, leading to the diversification and success of jawed vertebrates.


Is jaws 5 out?

there isn't a jaws 5 theres jaws jaws 2 jaws 3 jaws returns


Will there be a Jaws remake?

No, there are four Jaws movies: Jaws, Jaws 2, Jaws 3, and Jaws: The Revenge.There is an Italian film called Cruel Jaws, which some people consider to be the 5th Jaws movie. But this movie is not part of the Jaws franchise; it's what is commonly known as a "rip off" of the Jaws movies.


What are the names of the Jaws movies that have been made?

Jaws, Jaws 2, Jaws 3, and Jaws: The Revenge.


What order are all the jaws movies?

There were three sequels which followed the original Jaws(1975) film-- Jaws 2 (1978), Jaws 3-D (1983) and Jaws: The Revenge (1987). None of the sequels were directed by Steven Spielberg, the director of the original Jaws.


Is there ever going to be another Jaws movie?

No, there are four Jaws movies: Jaws, Jaws 2, Jaws 3, and Jaws: The Revenge.There is an Italian film called Cruel Jaws, which some people consider to be the 5th Jaws movie. But this movie is not part of the Jaws franchise; it's what is commonly known as a "rip off" of the Jaws movies.