1. Diversity of life forms
Taxonomy

2. Taxonomy
The science of classifying living organisms into different categories. Scientists classify species based on common characteristics or DNA.

3. Most common classification system
Kingdoms
Phyla
Classes
Orders
Families
Genera
Species

4. Kingdoms (5) Unicellular organisms only visible under a microscope
Protists : Unicellular. Have a nucleus known species
Fungi : Unicellular or multicellular. Fungi feed by decomposing living or non-living matter (mineral) known species
Plants : Multicellular. Almost always contain chlorophyll.(colour green and transform energy from the sun into food) known species
Animals : Multicellular. Feed on other living organisms known species
Monerans : Unicellular. No nucleus known species
Unicellular organisms only visible under a microscope

5. Other levels of classification
Phylum (mollusks, worms, etc)
Class (Fish, amphibians, reptiles, bird,etc)
Order (Bats, primates, rodents,etc)
Family
Genus
Species

6. Taxonomic key (Dichotomous key)
It is a tool that helps identify the group that a species belongs to.
classifications/dichotomous-keys/dichotomous-keys.html
Dichotomous means divided into two parts, a reference to the number of choices available at each stage.