Biodiversity is the variety of living things on Earth. Scientists classify them into groups by their features.
Vertebrates (animals with a backbone) fall into five groups: fish, amphibians, reptiles, birds and mammals. Invertebrates have no backbone (insects, worms, snails).
Remember
- 5 vertebrate groups: fish, amphibians, reptiles, birds, mammals.
- Invertebrates have no backbone.