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Chapter 46: Q19 (page 1369)
Carbon is present in the atmosphere as ________. a. carbon dioxide b. carbonate ion c. carbon dust d. carbon monoxide
The correct option is a. carbon dioxide .
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What term describes the use of mathematical equations in the modeling of linear aspects of ecosystems?
a. analytical modeling b. simulation modeling c. conceptual modeling d. individual-based modeling
The process whereby nitrogen is brought into organic molecules is called ________. a. nitrification b. denitrification c. nitrogen fixation d. nitrogen cycling
Compare the three types of ecological pyramids and how
well they describe ecosystem structure. Identify which
ones can be inverted and give an example of an inverted
pyramid for each
A food chain would be a better resource than a food web to answer which question? a. How does energy move from an organism in one trophic level to an organism on the next trophic level? b. How does energy move within a trophic level? c. What preys on grasses? d. How is organic matter recycled in a forest?
Which of the following statements about the nitrogen cycle is false?
a. Ammonification converts organic nitrogenous matter from living organisms into ammonium (NH4 + ).
b. Denitrification by bacteria converts nitrates (NO3 鈭� ) to nitrogen gas (N2 ).
c. Nitrification by bacteria converts nitrates (NO3 鈭� ) to nitrites (NO2 鈭� ).
d. Nitrogen fixing bacteria convert nitrogen gas (N2 ) into organic compounds.
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