Multiple Choice
Which cycle has been significantly altered by humans?
A) carbon
B) oxygen
C) nutrient
D) nitrogen
E) all of the above
Correct Answer:

Verified
Correct Answer:
Verified
Related Questions
Q5: Plant decomposition releases _ into the atmosphere.<br>A)
Q13: Earth has _ species of animals compared
Q25: Most of the carbon near Earth's surface
Q28: The biotic nutrients are finite and limited
Q32: Net primary productivity is measured in _
Q66: In studying environmental relationships, which of the
Q138: Which of the following is another term
Q147: Water is necessary for plants to survive.
Q154: What is true of the 1988 Yellowstone
Q157: Most atmospheric oxygen is a result of