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Reptiles originated about 320-310 million years ago in the steaming swamps of the Carboniferous period. They evolved from a group of amphibians known as the Labyrinthodonts (because of the maze-like structure of their teeth). These amphibians became increasingly adapted to dry land, and spent less time in the water. Their skin developed dry scales and they also began to lay dry, hard-shelled eggs on land rather than in water. Their offspring hatched as well-developed "mini adults" without having to go through a tadpole stage. As the Earth began to experience a drying trend at the end of the Carboniferous, early reptiles fared better than their amphibian counterparts. Reptiles would become the dominant land animals into the Permian period and throughout the Mesozoic Era in the form of dinosaurs.
What else can I help you with?
When did winged organisms evolve?
The first winged organisms were insects which evolved wings about 350 million years ago.
Did humans evolve from reptiles?
No, humans did not evolve from reptiles. Both humans and reptiles share a common ancestor from millions of years ago, but they evolved along separate paths.
Did dinosaurs evolve from reptiles?
Yes, dinosaurs did evolve from reptiles. They are part of a group called archosaurs, which also includes modern birds and crocodiles. Dinosaurs evolved from a group of reptiles called archosauriforms during the Triassic period.
What time is the dinosaur time?
The Mesozoic era is known as the Age of Reptiles. It lasted from 252 to 65.5 million years ago. However, dinosaurs didn't evolve until 231 million years ago. They died out at the end of the Mesozoic.
How long ago did mammals evolve from reptiles?
Although reptiles displaying mammal-like characteristics appeared around 300 million years ago, the first true reptiles evolved around 200 million years ago. Although it is not known what the first true mammal was, they are generally believed to have been small and shrew-like.
Was dinosaurs lived all over the land 300 million years ago?
None. The first dinosaurs did not evolve until around 230 million years ago. The first reptiles appeared just before 300 million years ago. These animals would have looked rather like lizards though they are not represented by any modern group of animals.
When did reptiles start to evolve?
About three hundred million years ago. "The origin of the reptiles lies about 320-310 million years ago, in the steaming swamps of the late Carboniferous, when the first reptiles evolved from advanced reptiliomorph labyrinthodonts. The oldest trace of reptiles is a series of footprints from the fossil strata of Nova Scotia, dated to 315 million years ago. The tracks are attributed to Hylonomus, the oldest known reptile in the biological sense of the word. It was a small, lizard-like animal, about 20 to 30 cm (8-12 in) long, with numerous sharp teeth indicating an insectivorous diet." (According to Wikipedia)
How long did it take for unicellular organisms to evolve to multicellular?
It is believed to have taken about 2 billion years for unicellular organisms to evolve into multicellular organisms. The transition from unicellular to multicellular life forms is thought to have occurred around 600 million years ago.
Which is older birds or reptile?
Reptiles are older, and birds are actually descended from them. The first reptiles appeared over 300 million years ago, while birds appeared about 150 million years ago.
Do viruses adapt and evolve?
Viruses can adapt to a living organism, but when not evolve. It can change the way it reacts which organisms over time, but not even in a million years, it will change into something else by evolving.
Did water dinosaurs go extinct?
There were no purely aquatic dinosaurs. It is generally assumed that all dinosaurs were terrestrial but there may have been semi aquatic dinosaurs that spent some time in water and some time on land.The marine reptiles generally assumed to be dinosaurs were in fact only distantly related.The sauria clade of reptiles would evolve into 4 main orders of reptile. Ichthyosauria, Sauroterygia, Lepidosauromorpha and Archosauromorpha.The Archosauromorpha order of reptiles evolved from sauria about 260 million years ago in the late permian period. They would later evolve into crocodiles, dinosaurs/birds and pterasaurs. Dinosaurs did not evolve until the late Triassic period about 230 million years ago. All dinosaurs apart from avian dinosaurs became extinct 65.5 million years ago. The only "dinosaurs" alive today are the birds.The Ichthyoaurs were the 1st class of reptiles to adapt to an aquatic lifestyle. Ichthyosaurias evolved from sauria about 245 million years ago. They could be found in the ocean for the next 155 million years. They became extinct 90 million years ago about 15 million years before the non avian dinosaurs.The Sauroterygia were thought to evolved from sauria about 245 million years ago. They were mostly semi aquatic reptiles all but the pleisoaurs became extinct during the extinction event at the end of the Triassic period. The pleisosaurs are thought to be mainly aquatic but died out 65.5 million years ago during the K-T extinction event. The largest known carnivour was a pleisosaur, Lipleurodon.The Lepidosauromporpha were thought to have evolved from saurai again 240 million years ago. They are very closely related to sauroterygiae. They would go on to evolve into many of the modern day reptiles such as lizards, snakes & turtles. One family that evolved from this order of reptiles was the mosasaurs. Mosasaurs did not evolve until the early Cretaceous Period about 140 million years ago and were to become extinct at the end of the Cretaceous along with non-avian dinosaurs, pterasaurs and pleisosaurs.Just a sub note that if you really want to see an aquatic dinosaur then go to the zoo and watch the penguins. Birds are so closely related to dinosaurs and share such similar morphology that they are now generally considered as avian dinosaurs.
Which reptiles ruled the world for more then 160 million years?
dinosaurs, i think
