BSCS Biology: A Molecular Approach

Chapter 4: Autotrophy: Collecting Energy from the Nonliving Environment

Chemoautotrophy

1.
Chemoautotrophs fix ____, usually with the Calvin cycle, using a variety of energy sources.
A)carbon dioxide
B)nitrogen
C)oxygen
D)iron
2.
Chemoautotrophs usually get their energy from an inorganic mineral such as ____.
A)bile
B)helium
C)water
D)iron
3.
In which of the following environments would you be most likely to find chemoautotrophs?
A)in a rain forest
B)in a deep-sea volcanic vent
C)on the moon
D)on a sunlit tree trunk
4.
What role do chemoautotrophs play in turning this stream water, polluted by a copper mine, a brown color?

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A)They oxidize copper ions in the mine drainage.
B)They kill stream plants, turning them brown.
C)They are produced by the copper mining process and have a brown color.
D)They do not play a role in this process.
5.
Nitrogen-oxidizing bacteria contribute to ____ growth by oxidizing ammonium ions to nitrite ions and nitrite to nitrate ions, which are more readily absorbed.
A)animal
B)stalactite
C)mineral
D)plant
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