[00] Animal Life Review

• Four characteristics of animals (MEHM):

  1. Multicellular
  2. Eukaryotic
  3. Heterotrophic
  4. Motile
• Distinguishing traits of Parazoa

  Asymmetry and lack of tissues
• Ability of an organism to move independently, using metabolic energy

  Motility
• Domain Eukaryota

  Kingdom Animalia

  • Parazoa
  • Porifera and Placozoa
  • Eumetazoa
  • Radiata
  • Cnidaria and Ctenophora
  • Bilateria
  • Protostomia
  • Deuterostomia
• Placozoa

  • Simpler than sponge
  • Represented only by Trichoplax adhaerens
  • Single small membrane for diffusion
  • No symmetry, no body tissues