1. Survey of Organisms Part 1
Bacteria, Archaea, and Protists

2. Kingdoms and Domains 3 Domains; 6 Kingdoms
Domain Bacteria Contains Kingdom Bacteria
Domain Archaea Contains Kingdom Archaea
Domain Eukarya Contains Four Kingdoms:
Protista
Fungi
Plantae
Animalia

3. Prokaryotes (18.4) Kingdom Bacteria Kingdom Archaea
Can survive extreme environments
Most widespread and abundant organisms on earth

4. Prokaryotes (18.4)
Prokaryotes have no membrane-bound organelles (no nucleus)
Single celled
DNA is circular and found in the cytoplasm (plasmids)
Prokaryotes often move on their own by gliding or using a flagellum

5. Bacteria versus Archaea
Bacteria contain a polymer called peptidoglycan in their cell walls; this is not present in Archaea
Bacteria are more diverse and widespread
Archaea found in extreme environments due to a heat resistant substance, isoprene

6. Bacteria Three common shapes of bacteria Bacillus or Rod Shaped
Spirillus or Spiral
Coccus or Spherical

7. PROTISTS Great Diversity Eukaryotes
May be single-celled or multicellular
Can be microscopic or very large
Some reproduce asexually, some reproduce sexually and asexually

8. PROTISTS, cont. Plantlike protists
These protists make their own food, like plants, by photosynthesis
May be single-celled, multicellular, or live in colonies
Algae is an example

9. PROTISTS, cont. Funguslike protists Animal-like protists
These protists decompose dead organisms
Slime molds and water molds are examples
Animal-like protists
these protists consume other organisms
Single-celled

10. Protozoa The term used to decribe animal-like protists
Protozoa may have one or more flagella – zooflagellates
Protozoa may have pseudopods (“fake foot”) – a temporary extension of cytoplasm and membrane that helps pull the protozoa along
Protozoa may have cilia – short hairlike structure help protozoa to swim & capture food

11. Plantlike Protists Euglenoids Dinoflagellates Diatoms
Single-celled protists swim with the aid of flagella
Fresh water or oceans
Dinoflagellates
Single-celled
Plankton (microscopic, live in water)
Some are toxic
Diatoms
Tiny single-cell algae, rigid glasslike shells