Protist
grouped one celled organisms
Heterotroph
an organism deriving its nutritional requirements from complex organic substances
Eukaryote
an organism consisting of a cell or cells in which the genetic material is DNA in the form of chromosomes contained within a distinct nucleus. Eukaryotes include all living organisms other than the eubacteria and archaebacteria
Decomposer
an organism, especially a soil bacterium, fungus, or invertebrate, that decomposes organic material
Parasite
an organism that lives in or on an organism of another species (its host) and benefits by deriving nutrients at the other’s expense
Host
an animal or plant on or in which a parasite or commensal organism lives
Fungi
Fungi is the plural word for “fungus”. A fungus is a eukaryotic organism
Spore
a toxin
Lichen
a simple slow-growing plant that typically forms a low crusty, leaflike, or branching growth on rocks, walls, and trees
Nonvascular plant
Nonvascular Plants Defined. Nonvascular plants belong to the division Bryophyta, which includes mosses, liverworts, and hornworts
Vascular plant
a plant that is characterized by the presence of conducting tissue
Gymnosperm
a plant that has seeds unprotected by an ovary or fruit. Gymnosperms include the conifers, cycads, and ginkgo
Angiosperm
a plant that has flowers and produces seeds enclosed within a carpel
Photosynthesis
the process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water
Cellular respiration
Cellular respiration is a set of metabolic reactions and processes that take place in the cells of organisms to convert biochemical energy from nutrients
Transpiration
Transpiration is the process by which moisture is carried through plants from roots to small pores on the underside of leaves, where it changes to vapor and is released to the atmosphere
Tropism
the turning of all or part of an organism in a particular direction in response to an external stimulus
Gravitropism
Gravitropism (also known as geotropism) is a coordinated process of differential growth by a plant or fungus in response to gravity pulling on it
Phototropism
the orientation of a plant or other organism in response to light, either toward the source of light ( positive phototropism ) or away from it
Asexual Reproduction
Asexual reproduction is a type of reproduction by which offspring arise from a single organism,
Toxoplasmosis
A disease that results from infection with the Toxoplasma gondii parasite
Malaria
A disease caused by a plasmodium parasite, transmitted by the bite of infected mosquitoes
Giardia
An intestinal infection caused by a giardia parasite
