Where is the deepest region in the ocean?
a. Aleutian Trench
b. East Pacific Rise
c. Mid-Atlantic Ridge
d. Peru-Chile Trench
e. Mariana Trench
e
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Helium, He, is a nonmetallic gas and the second element in the periodic table. Rather than being placed adjacent to hydrogen, H, however, helium is placed on the far right of the table because
A. helium is most similar to other group 18 elements. B. hydrogen and helium repel one another. C. the sizes of their atoms are vastly different. D. they come from different sources.
Which source of drinking water is most likely to be pure and safe to drink?
A) spring water B) bottled spring water C) river water D) municipal water
What is the approximate pI of most amino acids?
A) 3 B) 6 C) 7 D) 10
Which area is most likely to have the most populous and diverse community of organisms?
a. deep ocean b. surface of a polar ocean c. cobble beaches d. surface of temperate ocean e. intertidal zone