Which of the following have been correlated with sunspot cycles?
A) abnormally wet years
B) droughts
C) both abnormally wet years and droughts
D) neither abnormally wet years nor droughts
C
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Which item below refers to the uppermost of the permafrost zones?
a. talik b. permafrost c. permafrost table d. active layer e. laterite
Which of the following constitutes a difference between a glycolipid and a sphingolipid?
A) only one contains sphingosine B) only one contains a fatty acid C) only one contains phosphate D) only one contains a carbohydrate E) both c and d F) All of the choices a through d are differences.
Aspartate transaminase belongs to which group of enzymes?
A) hydrolases B) lyases C) oxidoreductases D) transferases
Which of the following is the most useful measure of water vapor in the air?
A) mixing ratio B) air pressure C) temperature D) dew point E) relative humidity