• Extremely diverse: can be algae-like, animal-like, fungus-like; unicellular, multicellular
  • Evolutionary relationships are weak, poorly understood, or both
    • Features shared by two or more groups may represent convergent evolution


  • All obtain energy by photosynthesis, have chlorophyll a

Protozoa/Animal like

  • Heterotrophs: Consume living cells or dead organic matter


  • Resemble fungus bcuz they form filaments or spore-bearing bodies