Tertiary consumers are usually in which trophic level?
A) decomposers
B) 1st trophic level
C) 2nd trophic level
D) 3rd trophic level
E) 4th trophic level
Answer: E
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How many basic tastes can humans distinguish?
A. 5 B. 3 C. 6 D. 4
Lead pollution is a problem because lead ________
A) causes central nervous system damage in humans B) will cause the ozone hole to increase C) forms an acid in the atmosphere, resulting in acid precipitation D) is a precious metal, and it is being lost to the atmosphere
Which is an example of Steno's Law?
a. A microscopic crystal of garnet will have a different crystalline shape from a gemstone-grade crystal of garnet. b. The crystal faces of quartz, regardless of the size of the crystal, are always 120 degrees apart. c. Only large, well-developed minerals are crystalline. d. The polymorphs graphite and diamond have the same crystal shape. e. Fluorite, magnetite, and garnet have unit cells that are the same shape and therefore have the same crystal structure.
A major water pollution problem is exposure to infectious bacteria, viruses, and parasites.
Answer the following statement true (T) or false (F)