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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.
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How did the first reptiles get on earth?
by god
How long have reptiles lived on earth?
Reptiles first appeared on Earth over 300 million years ago during the Carboniferous period. They have existed alongside dinosaurs and have evolved into various forms, adapting to different environments over time. Reptiles continue to thrive today and are found in almost every ecosystem on Earth.
When did marine reptiles first appear on earth?
the very First Marine Reptiles Returned To the Ocean About 240 Million Years Ago,
What modern cells do scientists believe to be close relatives of the Earth's first cells?
Scientists believe that modern cells called archaea are close relatives of Earth's first cells. Archaea are single-celled organisms that share similarities with the ancient cells that existed billions of years ago. Their ability to thrive in extreme environments suggests they may have characteristics similar to those of early life forms on Earth.
What do scientists Know about aliens?
they were first on earth
What molecule do scientists believe came first in the evolution of life on Earth?
Scientists believe that the molecule that came first in the evolution of life on Earth is RNA (ribonucleic acid).
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.
Scientists think the first water vapor on Earth came from?
From the oceans
What do scientists believe was the first piece of living organism on earth?
bacteria
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.
Why are reptiles the first true land vertabrates?
Reptiles were the first true land vertebrates because they were able to successfully adapt to terrestrial environments with features such as scales to prevent water loss, amniotic eggs for reproduction on land, and efficient respiratory systems for breathing air. These adaptations allowed reptiles to thrive on land, marking a significant evolutionary shift from their amphibian ancestors.
Where do scientists believe the first gases that created the atmosphere came from?
Scientists believe that the first gases that created the atmosphere came from volcanic activity and the release of gases from the Earth's interior.
