Did you know that all animals can be grouped as either vertebrates or invertebrates/ But what is a vertebrate? A vertebrate is an animal that has a spine, or backbone - a long column of bones running along its back. The animals in this large group can be divided into five smaller groups, or classes - fish, amphibians, reptiles, birds and mammals
All these are invertebrates. An invertebrate is an animal that doesn't have a backbone. Of all the millions of animals in the world, only about 45.000 different kinds, or species, have backbones. By far the greatest group are the invertebrates. Scientists have already given names to more than one million different species.rnInvertebrate animals include sponges, corals and jellyfish: worms, star…
Buku ini menjelaskan tentang berbagai macam hal mengenai sains yang ada di sekitar kita seperti : Hewan, Sel sel yang dapat dilihat oleh microscope Serta organ organ yang ada dalam hewan .