Domain of organisms prokaryotic that are biochemically and genetically distinct from bacteria.
Domain of prokaryotic organisms that are biochemically and genetically distinct from archaea.
The regions of the surface and atmosphere of the Earth where living organisms exist.
The basic structural and functional unit of all organisms.
A taxonomic group containing one or more orders.
The act of distributing things into classes or categories of the same type.
An organism that obtains energy by feeding on other organisms.
A long linear polymer found in the nucleus of a cell and formed from nucleotides and shaped like a double helix.
Most inclusive taxonomic category; larger than a kingdom.
A system formed by the interaction of a community of organisms with their physical environment.
The capacity to do work.
All of the surroundings factors that affect the developing and functioning of a living thing.
The nucleus of a eukaryote cell.
Having cells with 'good' or membrane-bound nuclei.
The sequence of events involved in the evolutionary development of a species or taxonomic group of organisms.
A taxonomic group containing one or more genera.
A segment of DNA that is involved in producing a polypeptide chain.
Taxonomic group containing one or more species.
Process by which organisms maintain a relatively stable internal environment.
One of seven biological categories: Monera or Protoctista or Plantae or Fungi or Animalia.
Consisting of many cells.
Taxonomic group containing one or more families.
A living thing.
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.
The major taxonomic group of animals and plants.
A group of organisms of the same species populating a given area.
An organism that makes its own food.
Cells that do not have a nucleus.
The ability to adapt to internal and external stimuli.
The sexual or asexual activity of conceiving and bearing offspring.
Type of organism or a distinct form of life.
Complex organization formed from a simpler combination of parts.
Having or consisting of a single cell.