One simple thing that you can do to help safeguard the environment is to eat a diet consisting only of organisms that are
A) producers.
B) primary consumers.
C) secondary consumers.
D) a mix of producers and consumers.
Ans: A) producers.
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When nitrate is used as a final electron acceptor by bacteria growing in anoxic soils, the nitrogen is no longer available for the construction of precursor metabolites. This is referred to as
A. dissimilatory nitrate reduction. B. nitrogen respiration. C. nitrogen fixation. D. nitrification.
A glucose molecule that is metabolized via aerobic respiration has been completely broken down and
released as CO2 by the end of: a. fermentation. b. the electron transport chain. c. glycolysis. d. ATP synthesis in the mitochondria. e. the citric acid cycle.
The study of the spatial arrangement of elements in communities and ecosystems is known as
A. community ecology. B. ecosystem ecology. C. landscape ecology. D. population ecology. E. global ecology.
Anaerobically growing yeast further metabolizes the pyruvate produced by glycolysis to CO2 and ethanol as part of a series of fermentation reactions
A. What other important reaction occurs during this fermentation step? B. Why is this reaction (that is, the answer to part A) essential for the anaerobically growing cell?