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  1. Animalia | Encyclopedia.com

    May 18, 2018 · Animalia The kingdom Animalia, or Metazoa, includes all animals. Animals are multicellular, eukaryotic organisms, which are heterotrophic, meaning they obtain nutrition from …

  2. Animal - Encyclopedia.com

    May 9, 2018 · Animal Animals are creatures in the kingdom Animalia, one of the five major divisions of organisms (the others are: Monera or bacteria , Fungi , Protists or protozoans, and Plantae or …

  3. Porifera - Encyclopedia.com

    May 23, 2018 · Porifera (Spongiaria, sponges) A phylum of aquatic Animalia, most of which are marine. They lack definite tissues and organs, but have a filter-feeding system composed of flagellate cells, …

  4. The Search for New Systems of Classification | Encyclopedia.com

    His original class names of Mammalia, Aves, Amphibia, and Insecta, along with his kingdoms of Plantae and Animalia, have survived the test of time. Scientists have since more than quadrupled the number …

  5. Cnidaria | Encyclopedia.com

    Jun 8, 2018 · Cnidaria Cnidaria is one of the more primitive animal phyla. It includes aquatic organisms such as jellyfish, sea anemones, corals, and hydras. Most cnidarians are marine, although a few, …

  6. Reptile | Encyclopedia.com

    Jun 8, 2018 · Reptiles A reptile is an organism in the kingdom Animalia and the class Reptilia. (Kingdoms are the main divisions into which scientists classify all living things on Earth; kingdoms …

  7. Insects and Spiders - Encyclopedia.com

    Insects are members of the Animalia kingdom and belong to the phylum Arthropoda, along with crustaceans. There are many classes of arthropods, including the insects and arachnids. Both are …

  8. Kingdoms of Life - Encyclopedia.com

    The eukaryotic Plantae, Fungi, and Animalia kingdoms contain mostly multicellular eukaryotes that differ in their structures, modes of nutrition, and life cycles (before reproduction).

  9. Zoology - Encyclopedia.com

    Jun 27, 2018 · ZOOLOGY ZOOLOGY. Zoology is the area of systematic biology that studies the animal kingdom. Systematic biology (or just systematics) is "the scientific study of the kinds and diversity of …

  10. Locomotion - Encyclopedia.com

    Jun 27, 2018 · Locomotion Locomotion is the active movement from one place to another. It does not include passive movements such as falling or drifting in currents of air or water. Many bacteria and …