The last glacial advance peaked in North America about ____ years ago
a. 150
b. 3,000
c. 18,000
d. 100,000
e. 2.6 million
c
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A cat strolls across your backyard. An hour later, a dog with its nose to the ground follows the trail of the cat. Explain what is going on from a molecular point of view.
A. The cat is leading the dog into a trap. B. The dog is smelling molecules from the cat. C. The dog is following the areas of increased density of the Earth. D. The dog is smelling atoms from the cat.
Nitrogen and phosphorous can be depleted by photosynthetic organisms during times of high productivity
Indicate whether the statement is true or false
One reason for worsening terms of trade is that less developed countries are often dependent on one primary commodity for export
Indicate whether the statement is true or false
________ deposits form through the desiccation of marine basins or lakes
Fill in the blank(s) with correct word