Microorganisms

Types of Microorganisms Bacteria – Kingdom Eubacteria Fungi – Kingdom Fungi Protists – Kingdom Protista

Bacteria The smallest and most common microorganisms are prokaryotes— unicellular organisms that lack a nucleus. Eubacteria have a cell wall that protects the cell and determines its shape. Found everywhere

Bacteria Identified by characteristics such as: shape the chemical nature of their cell walls the way they move the way they obtain energy

Bacteria Cocci - circular Bacilli – rod shape Spirilla – spiral or cork screw shaped

Bacteria Can be heterotrophs or autotrophs Reproduce by Binary Fission (asexual) or Conjugation (two cells) May produce spores

What Are Fungi? Fungi are eukaryotic heterotrophs that have cell walls. Their cell walls contain chitin, a complex carbohydrate. Reproduce asexually Some produce spores

Structure and Function of Fungi The body of a mushroom is part of a mycelium formed from many tangled hyphae. The major portion of the mycelium grows below ground. The visible portion of the mycelium is the reproductive structure, or fruiting body, of the mushroom. Copyright Pearson Prentice Hall

Animal-like, Plant-like, and Fungi-like Kingdom Protista

What Is a Protist? Eukaryotic Unicellular Can be autotrophs, heterotrophs, or decomposers Found in water

Protozoans – animal-like Protists Ameobas Paramecium Euglena

Ameoba Unicellular No definite shape Moves by pseudopods Consumer

Euglena Unicellular Have chloroplasts Move by flagella Has an eyespot (detects light) & contractile vacuole (removes water) Autotrophs

Paramecium Unicellular Move by cilia Outer membrane – pellicle Macronucleus – respiration, digestion Contractile vacuole Consumer

Algae Unicellular or Multicellular Produce 50% of oxygen we use Primary food source of water animals Classified by color Producers