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Biological Evolution: Unity and Diversity: Vertebrates and Invertebrates
Reptiles
Description
Reptiles
Reptiles are cold-blooded vertebrates that first appeared over 300 million years ago and were among the earliest animals fully adapted to life on land. Their scaly, waterproof skin and ability to lay amniotic eggs with protective shells allow them to reproduce without water, enabling su...
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Transcript
Reptiles are ectothermic animals—often called “cold-blooded”—and rely on external heat sources like the sun to regulate their body temperature.
Their scaly skin helps prevent them from drying out on land.
They breathe through lungs and have strong sense organs. For example, crocodiles rely on sharp vision, while turtles use their ke...
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