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Writing Skills - ACT

Writing Skills - ACT

Writing Skills - ACT

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Sample Passage #3Zebra Mussel<strong>Writing</strong> <strong>Skills</strong> Placement Test Sample ItemsAn increasing number of lakes and rivers in the northern United States invadedare being by a species no larger than a fingernail.2 31 2The zebra mussel probably steamed aboard a transatlantic ship sometime in themid-1980s from the Caspian Sea into U.S. waterways. Despite its growth wasexplosive, partly because the species was preyed upon by very few native predators inits new environment. As a consequence, the zebra mussels did find a plentiful foodsupply. They eat huge amounts of phytoplankton, which tiny free-floating seaorganisms that dwell in water. Scientists are concerned when the mussels maycompete aggressively with other species that depend on the same food supply.Being invasive, the species concerns industry, public utilities, and boat owners.Zebra mussels cluster in huge colonies, being anchored themselves to any hard surface.These colonies can clog your water intake pipes of electric and water treatment plants.Fishery specialists are currently casting about and baiting their hooks to gun down44 55 66 7 88 99 1011 12131415 1616 17© 2010 <strong>ACT</strong>, Inc. All rights reserved. 17

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