organism - a living thing that has (or can develop) the ability to act or function independentlybenthos - organisms (plants and animals) that live at or near the bottom of a sea dwarf - a plant or animal that is atypically small heterotroph - an organism that depends on complex organic substances for nutrition parent - an organism (plant or animal) from which younger ones are obtained cell - (biology) the basic structural and functional unit of all organisms; they may exist as independent units of life (as in monads) or may form colonies or tissues as in higher plants and animals native - indigenous plants and animals recombinant - a cell or organism in which genetic recombination has occurred conspecific - an organism belonging to the same species as another organism carrier - (genetics) an organism that possesses a recessive gene whose effect is masked by a dominant allele; the associated trait is not apparent but can be passed on to offspring denizen - a plant or animal naturalized in a region; "denizens of field and forest"; "denizens of the deep" amphidiploid - (genetics) an organism or cell having a diploid set of chromosomes from each parent diploid - (genetics) an organism or cell having the normal amount of DNA per cell; i.e., two sets of chromosomes or twice the haploid number haploid - (genetics) an organism or cell having only one complete set of chromosomes heteroploid - (genetics) an organism or cell having a chromosome number that is not an even multiple of the haploid chromosome number for that species polyploid - (genetics) an organism or cell having more than twice the haploid number of chromosomes aerobe - an organism (especially a bacterium) that requires air or free oxygen for life anaerobe - an organism (especially a bacterium) that does not require air or free oxygen to live crossbreed, hybrid, cross - (genetics) an organism that is the offspring of genetically dissimilar parents or stock; especially offspring produced by breeding plants or animals of different varieties or breeds or species; "a mule is a cross between a horse and a donkey" polymorph - an organism that can assume more than one adult form as in the castes of ants or termites plankton - the aggregate of small plant and animal organisms that float or drift in great numbers in fresh or salt water nekton - the aggregate of actively swimming animals in a body of water ranging from microscopic organisms to whales parasite - an animal or plant that lives in or on a host (another animal or plant); it obtains nourishment from the host without benefiting or killing the host host - an animal or plant that nourishes and supports a parasite; it does not benefit and is often harmed by the association commensal - either of two different animal or plant species living in close association but not interdependent myrmecophile - an organism such as an insect that habitually shares the nest of a species of ant eucaryote, eukaryote - an organism with cells characteristic of all life forms except primitive microorganisms such as bacteria; i.e. an organism with `good' or membrane-bound nuclei in its cells procaryote, prokaryote - a unicellular organism having cells lacking membrane-bound nuclei; bacteria are the prime example but also included are blue-green algae and actinomycetes and mycoplasma zooid - one of the distinct individuals forming a colonial animal such as a bryozoan or hydrozoan body part - any part of an organism such as an organ or extremity tissue - part of an organism consisting of an aggregate of cells having a similar structure and function |