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After reading the paragraphs below, answer the questions that follow.
Textile mills often release dye color and toxic by-products into rivers and streams, which may then taint groundwater. Fungi associated with mangrove trees have been shown to reduce both colors and toxicity in tainted groundwater.
-Suppose that in 1990, fungal treatment was added to stream water contaminated from a textile mill. The toxins in the water tend to lower pH levels, and scientists wanted to study how adding the fungal treatment affected stream pH levels. pH levels were recorded every year for five years. Results indicated that the acidity of the stream water decreased from pH 2.5 in the first year to pH 5.9 by the fifth year. Scientists concluded that
Soviet Union
A former federal socialist state in Northern Eurasia that existed from 1922 to 1991, known for its role in global political, military, and economic affairs.
Memory Storage
The process by which information is encoded, stored, and retained in the brain for future use.
Hippocampus
A neural center located in the limbic system; helps process explicit (conscious) memories—of facts and events—for storage.
Frontal Lobes
The portion of the cerebral cortex lying just behind the forehead; involved in speaking and muscle movements and in making plans and judgments.
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