?Which pollutants are responsible for cultural eutrophication of lakes?
Fill in the blank(s) with the appropriate word(s).
Near urban or agricultural areas, human activities can increase the input of plant nutrients to a lake. The inputs involve mostly nitrate- and phosphate-containing effluents from various sources, including farmland, feedlots, urban streets and parking lots, fertilized lawns, mining sites, and municipal sewage treatment plants.
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If a material has a half-life of 24 hours, how long do you have to wait until the amount of radioisotope is 1/4 its original amount?
A. 72 hours B. 48 hours C. 12 hours D. 24 hours E. practically forever, but it may be safe by then
What is a frustule?
A) The by-product of photosynthesis in diatoms B) The rigid cell wall of a diatom C) A microscopic phage that attacks diatoms D) None of these choices
Which type of cloud would dominate the weather in a region under the ITCZ?
A) cirrus B) altostratus C) cumulonimbus D) cirrocumulus
A plant nearly identical to the Kemper plant is built in Canada. What is the coal turned into so it can be burned?
What will be an ideal response?