Curare [kyoo-RAW-ree], for example, is found on the skin of ... Too much wind can dry their skin and dehydrate the animal. As a result, amphibians are the first to die off when their habitats ...

Vertebrates, for example, are divided into mammals, birds, reptiles, amphibians and fish. Mammals are warm-blooded animals with hair or fur and can produce milk to feed their young. They have ...