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Why do scientists think reptiles were the first to thrive on earth?
Wiki User
∙ 13y ago
Reptiles were the first animals to have hard-shelled eggs, meaning they are the first amniotes. What came with this was the first to develop internal fertilization. They evolved from amphibians who has water permeable skin to reptiles with hard waterproof skin, so they were able to eliminate their strong dependency for water. Along with developing waterproof skin, they were the first to develop a water retaining excretory system even more eliminating the need to live in water. All these characteristics make them the first to thrive on land.
Wiki User
∙ 13y ago
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How did the first reptiles get on earth?
by god
When did marine reptiles first appear on earth?
the very First Marine Reptiles Returned To the Ocean About 240 Million Years Ago,
How long have reptiles inhabited the earth?
Reptiles inhabited the earth before dinosaurs inhabited the earth. The first reptiles appear in the fossil record over 300 million years ago, in the Carboniferous period of the Paleozoic era.
What do scientists Know about aliens?
they were first on earth
Were chicken the first people on earth?
Chickens are descendents of dinosaurs who were descendents of reptiles. That seems to be where we branched.
What do scientists believe was the first piece of living organism on earth?
bacteria
Scientists think the first water vapor on Earth came from?
From the oceans
Which country was the first to orbit the Earth?
No country has ever orbited the earth. Scientists and engineers in the USSR placed the first man-made satellite in earth orbit, in 1957.
Who is the first scientist reached the planet mars?
No scientists from Earth have ever been to Mars.
Why do scientists think the first living cells to spear on earth were pobably anaerobic heterotrophs?
there was no oxygen in Earth's early atmosphere.
Which dinosaur is considered by scientists to be a reptile but not a dinosaur?
Your question is logically impossible. You must mean, "What prehistoric reptile is not considered by scientists to actually be a dinosaur?" The answer is that there were many mammal-like reptiles that predated the dinosaurs and were not dinosaurs. One example being Dimetrodon, which went extinct millions of years before the first dinosaurs evolved. Dinosaurs were not reptiles, but shared characteristics with both reptiles and birds. They were actually more like birds.
How do scientists calculate earth?
By measuring, and making observations. The first to make a significant calculation about the Earth was Eraosthenes, who measured the circumference of the Earth in about 200 BC.
