The Animal Kingdom
By Caitlin Kresta
3: Organisms that typically reproduce sexually
4: Organisms that do not have cell walls
5: Organisms that can respond changes in the external and internal environment
An animal distinguished by a backbone or spinal column
It is estimated that only 10% of the world's population is made up of vertebrates!
An animal lacking a backbone or spine
It is estimated that about 90% of the worlds population is made up of invertebrates!