The methanogenic archaeans are ____ that pull electrons from ____.
A. chemoautotrophs; oxygen
B. chemoheterotrophs; carbon dioxide
C. chemoautotrophs; water
D. chemoheterotrophs; methane
E. chemoautotrophs; hydrogen gas
Answer: E
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Which of the following is not part of the carpel?
A. style B. stamen C. ovary D. stigma