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Six Kingdoms of Life

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Six Kingdoms of Life

Six Kingdoms of Life

Wikimedia Commons

Organisms are classified into three Domains and into one of six Kingdoms of life. These Kingdoms are Archaebacteria, Eubacteria, Protista, Fungi, Plantae, and Animalia.

Organisms are placed into these categories based on similarities or common characteristics. Some of the characteristics that are used to determine placement are cell type, metabolism, and reproduction.

Below is a list of the six Kingdoms of life and information on a few organisms in each category.

Six Kingdoms of Life

I. Archaebacteria
    Organisms: Methanogens, Halophiles, Thermophiles, Psychrophiles

    Cell Type: Prokaryotic

    Metabolism: Depending on species - oxygen, hydrogen, carbon dioxide, sulfur, sulfide may be needed for metabolism.

    Nutrition Acquisition: Depending on species - nutrition intake may by absorption, non-photosynthetic photophosphorylation, or chemosynthesis.

    Reproduction: Asexual reproduction by binary fission, budding, or fragmentation.

II. Eubacteria
    Organisms: Bacteria, Cyanobacteria(blue-green algae), Actinobacteria

    Cell Type: Prokaryotic

    Metabolism: Depending on species - oxygen may be toxic, tolerated, or needed for metabolism.

    Nutrition Acquisition: Depending on species - nutrition intake may by absorption, photosynthesis, or chemosynthesis.

    Reproduction: Asexual reproduction

III. Protista
    Organisms: Amoebae, green algae, brown algae, diatoms, euglena, slime molds

    Cell Type: Eukaryotic

    Metabolism: Oxygen is needed for metabolism.

    Nutrition Acquisition: Depending on species - nutrition intake may be by absorption, photosynthesis, or ingestion.

    Reproduction: Mostly asexual reproduction. Meiosis occurs in some species.

IV. Fungi
    Organisms: Mushrooms, yeast, molds

    Cell Type: Eukaryotic

    Metabolism: Oxygen is needed for metabolism.

    Nutrition Acquisition: Absorption

    Reproduction: Asexual or sexual reproduction occur.

V. Plantae
    Organisms: Mosses, angiosperms (flowering plants), gymnosperms, liverworts, ferns

    Cell Type: Eukaryotic

    Metabolism: Oxygen is needed for metabolism.

    Nutrition Acquisition: Photosynthesis

    Reproduction: Some species reproduce asexually by mitosis. Other species exhibit sexual reproduction.

VI. Animalia

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