Kingdoms of Life
... of Life
Overview of Characteristics of each Kingdom
Organisms are mostly unicellular, have nucleus, and can be autotrophic or heterotrophic.
Organisms in this kingdom possess cell walls containing chitin, unlike cellulose present in cell walls of some protists and plants.
The kingdom includes all types of photosynthetic, multicellular, eukaryotic plants in the biosphere. Organisms in this category are autotrophs, that is, they manufacture their food using energy from the sun. A few species are both heterotrophs and autotrophs.
Organisms classified under Metazoans or the Kingdom Animalia have several characteristics: ingestive autotrop...