The key special chemical used by chemosynthetic communities at salt seeps is ________.
A. methane
B. phosphate
C. silicate
D. nitrate
E. hydrogen sulfide
Answer: A
Environmental & Atmospheric Sciences
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During old-field succession, the graph clearly shows that the number of species increases with time. During what period of time is this rate of increase the greatest?
A) 0-20 years B) 60-100 years C) 40-60 years D) 20-40 years E) cannot be determined from this data
Environmental & Atmospheric Sciences
____________________ occurs when crystals form in bodily fluids
Fill in the blank(s) with correct word
Environmental & Atmospheric Sciences
Suppose you are told that the area where you lived was once a shallow sea that evaporated. What kind of rock are you most likely to find that is related to that time?
A. Clastic B. Biochemical C. Chemical
Environmental & Atmospheric Sciences
Which of the following areas has the lowest total fertility rate (TFR)?
What will be an ideal response?
Environmental & Atmospheric Sciences