Absolutely necessary; extremely important.

A system in which an organism is given a scientific name with two terms.

Any organism that has a nucleus.

A group of similar, closely related organisms; the first part in a scientific name.

The categorizing of organisms based on similarities and differences.

The most general level of organism classification; Archaea, Bacteria, or Eukarya.

A diverse group of eukaryotes that are primarily single-celled.

To organize according to the same system.

Archaebacteria and eubacteria are both are both one-celled (No nucleus).

Where genetic material is stored for the organism and controls many cell activities.

For organisms to break down waste and remains to return to nutrients into the ecosystem.

Something that makes an area dirty or impure.

Make their own food

Consisting of only one cell

Hunts for their food (consumer)

Consisting of many cells