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Classification
| Term | Definition |
|---|---|
| classification | to put things together in groups based on similar characteristics |
| organism | a living thing |
| 8 levels of classification | Domain > Kingdom > Phylum (Division) > Class > Order > Family > Genus > Species |
| Domain | the highest level of classification. It is further divided into Kingdoms. Example: Eukarya |
| Kingdom | the second highest level of classification. It is further divided into Phyla/Divisions. Example: Animal |
| Phylum | the third highest level of classification for Protista and Animals. Example: Chordata |
| Genus | the second smallest level of classification. Organisms in the same _______________ are very closely related but do not have exactly the same set of chromosomes. Example: Canis |
| Species | the smallest level of classification. Organisms in the same _______________ have the same set of chromosomes and can mate to produce more of the same organisms. Example: Canis lupu |
| binomial nomenclature | The two-word naming system that creates a unique scientific name for each species Example: Canis lupus |
| common name | a non-scientific name for an organism used by people in a specific area |
| autotroph | an organism that can produce its own food using photosynthesis |
| heterotroph | an organism that eats other plants or animals for energy and nutrients |
| prokaryote | single-celled organism that has neither a distinct nucleus with a membrane nor other specialized organelles. |
| eukaryote | organisms—including animals, plants, fungi, and protists—whose cells possess a clearly defined nucleus enclosed by a membrane and other specialized membrane-bound organelles |
| Domain Archaea | Single-celled prokaryotes that often live in extreme environments (e.g., hot springs, high salinity). |
| Domain Bacteria | unicellular microorganisms which have cell walls but lack organelles and an organized nucleus, including some that can cause disease. |
| Domain Eukarya | Organisms with cells containing a distinct nucleus and membrane-bound organelles. This domain includes kingdoms Protista, Fungi, Plantae, and Animalia |
| Kingdom Bacteria | same as Domain Bacteria |
| Kingdom Archaeabacteria | same as Domain Archaea |
| Kingdom Protista | Diverse, mostly single-celled eukaryotic organisms that do not fit into other categories, such as algae, amoebas, and paramecium. |
| Kingdom Fungi | Eukaryotic, mostly multicellular organisms (like mushrooms, molds, yeasts) that absorb nutrients and have cell walls |
| Kingdom Plantae | Multicellular, eukaryotic organisms that produce their own food via photosynthesis and have cell walls |
| Kingdom Animalia | Multicellular, eukaryotic organisms that consume other organisms for energy and lack cell walls. Humans are in this Kingdom |