Biology
5th Edition
ISBN: 9781260487947
Author: BROOKER
Publisher: MCG
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Chapter 59, Problem 5TY
Summary Introduction
Introduction: The nitrogen cycle is an important biogeochemical cycle which comprises five major parts. The five major parts of the nitrogen cycle are nitrogen fixation, nitrification, assimilation, ammonification, and denitrification.
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Use of synthetic fertilizers often leads to the contamination of groundwater with nitrates. Nitrate pollution is also a suspected cause of anoxic "dead zones" in the ocean. Which of the following processes is most likely to help reduce nitrate pollution?
A. adding methanogens to the soil
B. adding nitrifying bacteria to the soil
C. adding denitrifying bacteria to the soil
D. using ammonia instead of nitrate as a fertilizer
Which statement offers the best explanation of how deforesting hubbard brooks watershed (W2) affected the nitrogen cycle?
1. Denitrification rates increased, resulting in a decrease in the export of ammonium
2. Microbial immobilization rates increased, resulting in a decline in stream nitrogen
3. Mineralization rates increased, causing the export of ammonium to increase
4. plant uptake nitrogen stopped, resulting in an increase in the export of nitrate
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
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- Give the importance of the a) water cycle b) nitrogen cyclearrow_forwardfertilizers are necessary if the soil lacks one of the following nutrients: a. calcium, carbon, potassium b. nitrogen phosphorus, potassium c. nitrogen, phosphorus, magnesium d. nitrogen, calcium, magnesium e. phosphorus, potassium, magnesiumarrow_forwardwhat organism would be most affected by a blightr that eliminates all plant material from an ecosystem? a. hetertrophic marine decomposers b. hetertrophic soil decomposers c. chemolithoautotrophs d. oxygenic microbial phototreophs e.anoxygenic microbial phototreophsarrow_forward
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