Answer :
There are 7000 species of amphibians in the world, many of them are threatened is half of that amount or 3500 species.
Amphibians are small vertebrates that require water or a moist environment to survive. Amphibians are cold-blooded animals and are vertebrates that undergo metaformosis. These animals also have permeable and moist skin that allows the exchange of oxygen and carbon dioxide with the environment.
There are about 7000 species of amphibians found in the world today. However, about 3500 amphibian species or half of it threatened, and about hundreds of amphibians have also been hard to find lately. This is due to loss of habitat where they live due to natural factors and human activities. Amphibians are animals that cannot maintain body temperature homeostasis, so they depend on environmental temperature. When the temperature of the environment changes, many amphibians cannot survive so that many species become extinct.
Learn more vertebrates at:
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