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Chapter 46: Q. 4 (page 1367)
The ability of an ecosystem to return to its equilibrium state after an environmental disturbance is called ________. a. resistance b. restoration c. reformation d. resilience
The correct option is d. resilience .
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The average time a molecule spends in its reservoir is known as ________. a. residence time b. restriction time c. resilience time d. storage time
2. The process whereby oxygen is depleted by the growth of microorganisms due to excess nutrients in aquatic systems is called ________. a. dead zoning b. eutrophication c. retrofication d. depletion
The process whereby nitrogen is brought into organic molecules is called
a. nitrification
b. denitrification
c. nitrogen fixation
d. nitrogen cycling
Why do you think the value for gross productivity of the primary producers is the same as the value for total heat and respiration (20,810 kcal/m2 /yr)?
What are the factors that cause dead zones? Describe
eutrophication, in particular, as a cause.
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