Scientists classify living things into groups based on their characteristics - we sometimes change our minds as we learn more about these organisms

All living things are separated into the FIVE kingdoms.

ANIMALS are multicellular, get nutrition by eating, cells contain a nucleus and organelles carry out the different functions in the cell

PLANTS are also multicellular, carry out photosynthesis and have chloroplasts inside their cells. The cells also have a nucleus, cell walls made of cellulose and different organelles

FUNGI are multicellular (except yeast), usually feed on dead living things (saprophytic) or living things still alive (parasitic). The cells have a nucleus and cell walls without cellulose.

BACTERIA are unicellular, simple cells with no nucleus or organelles
PROTOCTISTA most are unicellular, complex cells