Multiple Choice
The atoms that make up the molecules in our bodies:
A) cannot be rearranged to make different molecules under any circumstances.
B) have nearly all been on Earth throughout its entire history.
C) traveled to Earth as electromagnetic waves.
D) were all formed recently by nuclear fusion on the sun.
E) will be lost back to space soon after we die.
Correct Answer:

Verified
Correct Answer:
Verified
Q18: Why is phosphorus so important to living
Q56: Fossil fuels are the major reservoir in
Q59: Since plants cannot fix nitrogen, why are
Q60: Once used by an organism, carbon and
Q63: The primary consumers in marine food chains
Q64: Each summer a large "dead zone" devoid
Q66: What are the sources of sulfur in
Q67: List and discuss three effects of acid
Q79: Your _is a measure of your impact
Q96: The global phosphorus cycle is called a