Domains and Kingdoms Images, from left to right: Cholera bacteria, Volvox colony, Strep bacteria
THE DOMAINS A domain is the broadest level in the classification of life. All living organisms belong to one of 3 domains: ARCHAEA BACTERIA EUKARYA Do you remember which one you belong to?
I. ARCHAEA Domain Archaea contains one kingdom – also named Archaea. Comes from a Greek word meaning “ancient.” In fact, the last common ancestor of all life on Earth may have been archaea – that’s how old they are! Archaea are Prokaryotic (does not have a nucleus) Archaea are often found in extreme environments where other life cannot survive. For example, these extremophiles can be found in extremely hot, cold, salty, oxygen-free and/or acidic environments such as in hot springs, volcanic environments, salt lakes or in the guts of animals.
II. BACTERIA Domain Bacteria contains one kingdom – also named Bacteria. Bacteria are prokaryotic. Bacteria are microscopic There are more bacteria in our bodies than there are cells in our body!
Bacteria - Continued Bacteria have 3 shapes: round, rod, and spiral.
III. EUKARYA Are eukaryotic (cells have a nucleus). The 4 Kingdoms found in this Domain are: Plantae Animalia Fungi Protista
Kingdom Plantea Plants are eukaryotic Plants have cell walls (animals have cell membranes) Plants make their own food (autotrophic) through photosynthesis. Most life forms depend on plants for food and oxygen.
Kindom Protista All Protists are eukaryotic. Most are single-celled; some are simple, multi-cellular organisms. Some protists are animal-like (protozoa); some are plant- like (algae); some are both (euglena)! Protists are also fungus-like (slime molds).
Kingdom Fungi All Fungus are eukaryotic. Fungus can be single-celled (yeast) or multi-cellular (mushroom). Fugus break down and absorb nutrients from their surroundings (heterotrophic). Fungus do not photosynthesize or move.
Kingdom Animalia Animal cells are eukaryotic and contain a cell membrane. Animals are multi-cellular. Animals have special senses that allow them to respond to their environment. Animals can usually move – some, like sponges, have very limited ability to move. Animals feed off of other life forms (heterotrophic).
Do you remember…. IIn which domain would you find an organism catagorized that lives in the Great Salt Lake in Utah? Archaea IIn which domain would you find the E. coli bacteria? Bacteria HHow many Kingdoms are in the domain Eukarya? 4 CCan you name them? Protista, Fungi, Plantae, Animalia
Do you remember… HHow do plants get nourishment? Photosynthesis NName 2 characteristics of plant cells. 1. Eukaryotic2. Cell wall WWhat 3 other organisms are Protists similar to? Plants, animals and/or Fungus AAre protists eukaryotic or prokaryotic? Eukaryotic AAre fungus single-celled or multi-cellular? They may be either HHow do animals get nourishment? By consuming other living things