What kind of information can marine microfossils not provide?
A) Temperature variations in the surface and deep water.
B) Patterns in ocean circulation
C) The orientation of the magnetic poles based on trace metals found within the shells
D) Productivity of the marine biosphere and upwelling
C
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How long did the process of density stratification of Earth last?
a. 100 million years b. 100 thousand years c. 10 billion years d. 1 billion years
Light that is scattered and eventually reaches the earth's surface after having its direction changed is called ________
Fill in the blank(s) with correct word
During the day, mountain valleys heat more rapidly than mountain slopes
Indicate whether the statement is true or false
Organic farming ________
A) has no national standards in the United States B) is presently limited to crops of fruits and vegetables C) and organically grown produce have not been supported by the European Union D) began in the 1960s E) has become more challenging because of contamination by GM crop varieties