Pre-IB Bio-Kingdoms & Domains

Eukarya

One of the three domains of living organisms that contains all eukaryotic organisms, including animals, plants, fungi, and protists.

Bacteria

One of the three domains of living organisms containing prokaryotic organisms known as eubacteria.

Archaea

One of the three domains of living organisms consisting of prokaryotic organisms called archaebacteria, often found in extreme environments.

Kingdom Animalia

A kingdom within the domain Eukarya; eukaryotic, multicellular, heterotrophic organisms that typically reproduce sexually.

Kingdom Plantae

A kingdom within the domain Eukarya; eukaryotic, multicellular, autotrophic organisms, most of which are found on land.

Kingdom Fungi

A kingdom within the domain Eukarya; mostly multicellular, eukaryotic, heterotrophic organisms.

Kingdom Protista

A kingdom within the domain Eukarya; consists mostly of unicellular eukaryotic organisms that can be autotrophic or heterotrophic.

Eubacteria

A classification within the domain Bacteria consisting of prokaryotic organisms that lack a nucleus and live in common environments.

Archaebacteria

A classification within the domain Archaea that consists of unicellular prokaryotic organisms which can be autotrophic or heterotrophic and are adapted to extreme environments.

Binomial nomenclature

Linnaeus’ system for naming organisms using a two-part format consisting of the genus name and the species name.

Levels of biological classification

Hierarchy established by Linnaeus that includes domain, kingdom, phylum, class, order, family, genus, and species.

Prokaryotic

Cells that do not have a nucleus or other membrane-bound organelles.

Eukaryotic

Cells that contain a nucleus and other membrane-bound organelles.

Autotrophs

Organisms that produce their own food, typically through photosynthesis.

Heterotrophs

Organisms that obtain their food by consuming other living things.