People who propose that threatened plants should be protected because they may yield valuable medicines believe in the ____ value of species.
A. economic value.
B. instrumental value.
C. medical value.
D. ecological value.
E. biological value.
Answer: B
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What is the most effective way to differentiate potassium feldspar from plagioclase feldspar?
a. Plagioclase feldspars have cleavage planes in two directions at 90?, whereas potassium feldspars have cleavage planes in two directions not at 9?. b. Potassium feldspars have cleavage planes in two directions at 90?, whereas plagioclase feldspars have cleavage planes in two directions not at 90? c. Some cleavage planes of potassium feldspars have striations, whereas no plagioclase feldspars have striations. d. Potassium feldspar is harder than plagioclase feldspar. e. Some cleavage planes of plagioclase feldspars have striations, whereas no potassium feldspars have striations.
The feudal or tribute system by which Spanish landowners had jurisdiction over the Native Americans was called ______________________.
Fill in the blank(s) with the appropriate word(s).
Most of India is dominated by:
A) Coniferous forest B) Desert shrub C) Tropical savanna, mixed grassland and woodland D) Tropical forest
The Coriolis force is not dependent upon
A) Earth's rotation rate. B) wind speed. C) latitude. D) longitude. E) none of the above