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Zebras Zebras are striped members of the horse family (Equidae) native to Africa. These grazing animals stand 4–5 ft (1.2–1.5 m) high at the shoulders and are distinctive because of their striking white and black or dark brown str... Study Pack: 1 Summary About 11 pages (3,374 words) in 1 product

Zebra Mussel The zebra mussel (Dreissena polymorpha) is a small bivalve mollusk native to the freshwater rivers draining the Caspian and Black Seas of western Asia. This species of shellfish, which gets its name from the dark brown stripes on its tan... Study Pack: 1 Summary About 7 pages (2,187 words) in 1 product

Zero Discharge Zero discharge is the goal of eliminating discharges of pollutants by industry, government, and other agencies to air, water, and land with a view to protect both public health and the integrity of the environment. Such a goal is difficult... Study Pack: 1 Summary About 1 pages (194 words) in 1 product

Zero Population Growth Zero population growth (also called the replacement level of fertility) refers to stabilization of a population at its current level. A population growth rate of zero means that people are only replacing themselves, and that the birth and ... Study Pack: 2 Summaries About 3 pages (768 words) in 2 products

Zero Risk A concept allied to, but less stringent than, that of zero discharge. Zero risk permits the release to air, water, and land of those pollutants that have a threshold dose below which public health and the environment remain undamaged. Such... Study Pack: 1 Summary About 0 pages (92 words) in 1 product

Zoo   As far back as the historical record goes, there is evidence of people keeping wild animals in cages. During the Middle Ages in Europe, rare and exotic animals, and occasionally even foreign natives, were displayed in traveling caravans ca... Study Pack: 5 Summaries About 159 pages (47,570 words) in 5 products

Eelgrass Eelgrass is the common name for a genus of perennial grasslike flowering plants referred to as Zostera. Zostera is from the Greek word zostermeaning belt, which describes the dark green, long, narrow, ribbon shape of the leaves that rang... Study Pack: 1 Summary About 3 pages (782 words) in 1 product