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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.

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Reptiles evolved from amphibians.

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Q: What organisms did reptiles evolve from 300 million years ago?
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Related questions

When did winged organisms evolve?

The first winged organisms were insects which evolved wings about 350 million years ago.


How long ago did mammals evolve from reptiles?

Mammals evolved from reptiles around 200 million years ago, during the Mesozoic Era. This evolutionary transition led to the development of unique features that distinguish mammals from reptiles, such as hair, mammary glands, and a more advanced brain structure.


Did dinosaurs evolve from reptiles?

Dinosaurs evolved from reptiles not the other way around. The first reptiles where thought to have evolved during the late Carboniferous Period about 320 to 310 million years ago. Dinosaurs do not appear in the fossil record until the late Jurassic Period about 230 million years ago. They evolved from the reptilian infra class Archosaurs.


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.


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.


How did fish evolve?

Fish were the first chordates (organisms with a spinal cord), and also the first vertebrates (organisms with a spinal column). Developing a spinal cord gave them an advantage over their arthropod enemies, because they could swim faster and were much more agile. It is difficult to say exactly when the first fish evolved or which was the first fish, but we do know that the earliest fish evolved between 400-500 million years ago. They were jawless, with gills and scales but no fins. Eventually fish greatly diversified and occupied almost every water environment. They developed fins and a strong tail to help them swim better. They were also the first animals to develop jaws and teeth, enabling them to eat other animals. The following lists the possible evolution of the fish over time: About 460 to 480 million years ago: The first jawless fish evolve. (It's worth noting here that this starting point is hotly debated in the scientific community.) About 450 million years ago: The first jawed fish emerges. About 390 million years ago: The ancestors of the bony fish evolve. About 380 million years ago: The first shark-like fish evolves. About 360 million years ago: The early offshoots of the bony fish (Osteichthyes) evolve into the first amphibians (intermediates between fish and reptiles). About 175 million years ago: The first true bony fish emerge. Between 190 and 135 million years ago: The first modern sharks evolve.


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)


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 Humankind Evolve - or come - from single Celled Organisms?

Yes, thoroughly, however it takes two to three Billion Years to Explain it All. For example, all the while minor Organisms where in Full Living Swing, the Parting of the minor Organisms into The Two Sexes occurred 575 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.


When did bats evolve?

50-60 million years ago.


When did bony fish evolve?

395 Million years ago