Which of the following is a process of the nitrogen cycle that involves the conversion of nitrogen gas to ammonia?   a.Nitrogen fixation   b.Nitrification   c.Ammonification   d.Denitrification

It is common for bogs to have a pH of 3, why does this make them nutrient poor? 1. Low pH reduces the solubility of many nutrients. 2. Low pH increases nutrient binding to organic matter. 3. Low pH prevents the growth of the microorganisms responsible for the breakdown of organic matter. 4. Low pH reduces cation exchange.

These bacteria ferment sugars, produce lactate, and are used for some food production.   a. Bacillus   b. spirochetes   c. cyanobacteria   d. Agrobacterium   e. Lactobacillus

The majority of ethanol produced in the US comes from   A. Corn   B. Soy   C. Canola   D. Wood Mulch

27. Cultural eutrophication is a natural process.     A) True   B) False 28. In the carbon cycle _________________________.     A)  CO2 enters the ocean primarily by photosynthesis.   B)  photosynthesis always balances respiration.   C)  Carbon enters the food chain in the form of carbonic acid.   D)  CO2 in the ocean forms a weak acid.

Which among A-D is not a step in the eutrophication process? A) O rapid growth of algae and cyanobacteria B) O influx of excess nutrients to an aquatic environment, particularly nitrogen and phosphorous C) O heterotrophic, aerobic respiration D) O eventual increase in the numbers of fish and other aquatic life due to the rise m oxygen concentration of the water E) OA-D are all a part of eutrophication