Which is the most important molecule in the ecosystem?
A) oxygen B) nitrogen C) salt D) lead E) water
Answer: E
You might also like to view...
What is earthquake intensity, how is it measured, and what factors are involved in the intensity of a
quake? What will be an ideal response?
What happens to P- waves and S-waves when they encounter the core-mantle boundary, and what does
this change in behavior indicate about the core? What will be an ideal response?
In the upper atmosphere,
A) horizontal pressure gradients are smaller than vertical pressure gradients B) horizontal pressure gradients are the same as vertical pressure gradients C) horizontal pressure gradients are larger than vertical pressure gradients D) pressure is relative constant
According to the USGS, each person in the United States uses an average of how many metric tons of mineral resources each year?
A. 2 B. 12 C. 22 D. 32 E. 42