What type of cleavage would be exhibited by a mineral that has this arrangement of silicon tetrahedron? 
A. one direction of cleavage
B. the mineral fractures instead of cleaves
C. two nonperpendicular directions of cleavage
D. two perpendicular directions of cleavage
Answer: D
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The family of languages known as the Indo-European family contains languages spoken by approximately ________ of the world population
A) 25% B) 30% C) 50% D) 70%
What do most deep water consumers depend on for survival?
A) The productivity of the water column above B) Chemosynthetic productivity C) The deep scattering layer of nutrients D) Rift communities
Dialects developed within England primarily because
A) different Germanic invaders settled in different regions. B) the Normans invaded from the south. C) the Viking invaders did not remain long in England. D) British Received Pronunciation became the standard dialect. E) commerce developed more slowly in England than on the European continent.
?What type of rate is lower in more developed countries as compared to less-developed countries and why?
Fill in the blank(s) with the appropriate word(s).