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chromosomes ■ verb to make a map of a place or area

MAP abbr Mediterranean Action Plan maple noun a hardwood tree of northern temperate regions, some varieties of which produce sweet sap which is used for making sugar and syrup. Genus: Acer. MAPPS model noun a global biological and geographical model that simulates the potential natural vegetation that will grow at any site in the world. Full form mapped atmosphere-plant-soil model maquis noun in the Mediterranean area, shrubby vegetation, taller than garrigue, of evergreen shrubs and small trees with thick or spiny leaves marble noun a form of limestone that has been metamorphosed, used especially in building and sculpture as it can be polished to give a flat shiny surface margin noun 1. the edge of a place or thing O the eastern margin of the continent O unploughed strips at the margins of the fields O a leaf margin 2. an amount by which an amount or estimate may be different from the one expected without it causing a problem. Also called margin of error 3. a blank space around a section of printed text marginal adjective 1. referring to areas of land such as field edges or banks beside roads which are at the edge of cultivated land 2. referring to a plant which grows at the edge of two types of habitat O marginal pond plants such as irises 3. referring to land of poor quality which results from bad physical conditions such as poor soil, high rainfall or steep slopes, and where farming is often difficult O Cultivating marginal areas can lead to erosion. 4. situated in the spaces around a section of printed text O marginal notes mariculture noun the breeding and keeping of sea fish or shellfish for food in sea-water enclosures marine adjective 1. referring to the sea O seals and other marine mammals 2. an animal or plant which lives in the sea marine biocoenosis noun a varied community of organisms living in the sea marine biology noun the scientific study of sea life marine disposal noun the depositing of waste at sea marine ecology noun the study of the relationship between organisms that live in the sea and their environment marine environment noun the areas of the world usually covered by or containing sea water, including seas and oceans, river estuaries, and coasts and beaches marine fauna noun the animals that live in the sea marine flora noun the plants that live in the sea marine habitat noun an area of sea coast, including features such as beaches, cliffs, salt marshes, dunes or mangrove swamps marine park noun a natural park created on the bottom of the sea where visitors can go into observation chambers to look at the fish and plant life. Compare oceanarium marine pollution noun the harmful effects of human activities such as disposal of waste into the sea on marine organisms and their environment, with resulting hazards to human food and health maritime climate noun a climate that is modified by the influence of the sea, giving mild winters and warm summers, but with high rainfall marked adjective clear and definite O marked changes in climatic conditions marker noun same as genetic marker market garden noun a place for the commercial cultivation of plants, usually vegetables, soft fruit, salad crops and flowers, found near a large urban centre which provides a steady outlet for the sale of its produce marl noun a fine soil formed of a mixture of clay and lime, used for making bricks MARPOL Convention noun the main international agreement for the prevention of pollution of the sea by ships, either accidentally or deliberately. Full form Convention for the Prevention of Pollution from Ships marram grass noun a type of grass planted on sand dunes to prevent them being spread by the wind. Latin name: Ammo-phila arenaria.

MARS noun a computer network used by member countries of the EU and OECD for reporting and exchanging information on serious industrial accidents in a standard format. Full form Major Accident Reporting System marsh noun an area of permanently wet land and the plants that grow on it (NOTE: Marshes may be fresh water or salt water and tidal or non-tidal. A marsh usually has a soil base, as opposed to a bog or fen, which is composed of peat.)

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