freshwater clams

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• Freshwater bivalves — are bivalve mollusks which live in freshwater, as opposed to saltwater. Although the majority of species of bivalve mollusks live in the sea, a number of different families of bivalves live in freshwater (and in some cases in freshwater and… …   Wikipedia

• conservation — conservational, adj. /kon seuhr vay sheuhn/, n. 1. the act of conserving; prevention of injury, decay, waste, or loss; preservation: conservation of wildlife; conservation of human rights. 2. official supervision of rivers, forests, and other… …   Universalium

• Dwight Willard Taylor — Born 1932 Died 2006 Nationality United States …   Wikipedia

• Living machines — are a form of biological wastewater treatment designed to mimic the cleansing functions of wetlands. They are intensive bioremediation systems that can also produce beneficial by products such as methane gas, edible and ornamental plants, and… …   Wikipedia

• reproductive system, animal — Introduction       any of the organ systems by which animals reproduce.       The role of reproduction is to provide for the continued existence of a species; it is the process by which living organisms duplicate themselves. Animals compete with… …   Universalium

• Corbicula — For the pollen holding structure on the posterior tibiæ of some hymenopterans, see Pollen basket. Corbicula Corbicula leana …   Wikipedia

• List of non-marine molluscs of Montana — Location of Montana The non marine mollusks of the state of Montana are a part of the molluscan fauna of Montana (wildlife of Montana), a northwestern state in the USA. The non marine mollusks of Montana consist of land snails and slugs as well… …   Wikipedia

• Estimates of recent and future extinction rates — ▪ Table Estimates of recent and future extinction rates group number of living species number of extinctions per indicated time period (in years) extinctions per million species per year Recent extinctions birds (described 1800 99) 7,079 39/100… …   Universalium

• pearl — pearl1 pearler, n. pearlish, adj. pearllike, adj. /perrl/, n. 1. a smooth, rounded bead formed within the shells of certain mollusks and composed of the mineral aragonite or calcite in a matrix, deposited in concentric layers as a protective… …   Universalium

• Pearl — /perrl/, n. 1. a town in central Mississippi. 20,778. 2. a female given name. * * * I Concretion formed by a mollusk and consisting of the same material (called nacre, or mother of pearl) as the mollusk s shell. Long treasured as gemstones,… …   Universalium

• Sphaerium — Taxobox name = Sphaerium image caption = Sphaerium corneum image width = 250px regnum = Animalia phylum = Mollusca classis = Bivalvia subclassis = Heterodonta ordo = Veneroida subordo = Sphaeriacea familia = Sphaeriidae genus = Sphaerium genus… …   Wikipedia