Life on Earth can use a variety of different carbon and energy sources. However, the one thing that no organism on Earth can survive without is
A) water in any form: solid, liquid, or gas
B) oxygen
C) a liquid solvent of any kind
D) liquid water
Question 2
You are in a place that is extremely hot and dense, making you feel quite sweaty and claustrophobic. You can't see far because your surroundings are opaque to light. Around you, nuclear fusion is converting carbon into oxygen and other elements.
Where are you? A) You are in the center of a star very much like our Sun.
B) You are in the early universe during the era of nucleosynthesis.
C) You are inside a nuclear power plant on Earth.
D) You are in the center of a massive star near the end of its life.
E) You are in the center of a star much smaller than the Sun.
Cell Energy
Rivers on Mars and Earth
Searchable Scientific Literature Databases and Sources
Energy flow and chemical cycling
Possible Sources of Differences in Output per Worker
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