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Unit 1A

Characteristics of Organisms

TermDefinition
Sexual Reproduction A reproductive process that involves two parents that combine their genetic material to produce a new organism, which differs from both parents
Asexual Reproduction A reproductive process that involves only one parent and produces offspring that are identical to the parent.
Autotroph An organism that makes its own food from simple inorganic substances such as carbon dioxide
Heterotroph Organism that obtains energy from the foods it consumes; also classified as a consumer
Prokaryotic An organism whose cells do not have an enclosed nucleus, such as bacteria.
Eukaryotic A cell characterized by the presence of a nucleus and other membrane-bound organelles. Eukaryotes can be unicellular (protists) or multicellular (fungi, plants and animals).
Unicellular A single celled organism
Multicellular An organism made up of more than one cell.
Photosynthesis Process by which plants and some other organisms use light energy to convert water and carbon dioxide into oxygen and high-energy carbohydrates such as sugars and starches
Chemosynthesis Process by which some organisms, such as certain bacteria, use chemical energy to produce carbohydrates
Kingdoms A grouping system that divides organisms into 6 major categories
Kingdom Eubacteria A kingdom of prokaryotic organisms that contains mostly free-living and common bacteria; classified under Domain Bacteria, whose cell walls are made up of peptidoglycan
Kingdom Achaeabacteria Microorganisms that are similar to bacteria in size and simplicity of structure but radically different in molecular organization. They are now believed to constitute an ancient intermediate group between the bacteria and eukaryotes
Kingdom Protista A kingdom of a variety of eukaryotic unicellular, colonial, and multicellular organisms, such as ameoba, euglena, paramecieum, protozoans, algae, etc.; classified under Domain Eukarya
Kingdom Fungi a kingdom a of unicellular and multicellular, eukaryotic organisms, such as mushrooms and molds, that have a cell wall containing chitin; classified under Domain Eukarya
Kingdom Plantae Complex, multi-cellular organisms that use photosynthesis to make food.
Kingdom Animalia A kingdom a of multicellular, eukaryotic organisms that are free-moving, and lack cell walls; classified under Domain Eukarya
Created by: PRO Teacher dowdyp