What is the basis of modern classification?

The modern classification system categorizes organisms in to 6 different kingdoms. The kingdoms are Archaebacteria - which are single celled microorganisms that are prokaryotes so they don't have nucleus or organelle that are membrane bound. They don't need oxygen or light. Eubacteria- are single celled microorganisms that need light, oxygen, and food but are still prokaryotic. There are heterotrophic chemotrophic , and autotrophic bacteria. Eubacteria organisms are known as true bacteria Protists- are SINGLE CELLED organisms that live in low oxygen leveled environments by the description of scientist. Fungi- are either unicellular or multicellular eukaryotic organism. They live in marine, terrestrial, or freshwater environments but they CAN NOT MOVE Plants- are multicellular eukaryotic organism that have a cell wall made up of cellulose. They reproduce sexually and asexually. They are autotrophic which means making their own food. Animals- are multicellular organism that can move and breathe. They don't make their own food. Scientist divide organisms in these kingdoms by characteristic. Scientist also put organisms in theses kingdoms to help them be aware of their surroundings. read less