What is the most common interaction between species?
A. competition
B. predation
C. parasitism
D. mutualism
E. commensalism
Answer: A
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At the root of all magnetism is
A. tiny bits of iron. B. ferromagnetic materials. C. tiny domains of aligned atoms. D. moving electric charge.
Ozone can be created by all of the following processes except
A) sunlight acting on hydrocarbons. B) scattering by UV-B and UV-C radiation. C) lightning during thunderstorms. D) UV-C radiation in stratosphere.
Synergistic effects of toxicants that are mixed together ________
A) typically have simple additive effects B) are not numerous in the natural environment C) have effects that tend to cancel one another out D) always involve synthetic toxicants E) often are multiplicative (the mixed toxicants may multiply each other's effects)
The mineral fluorite is commonly sold in mineral shops as octahedral (8-sided) objects. This shape originates from ________
A) the growth of fluorite in caves and is the form the crystals grow in the open cavern B) cutting a larger crystal along four perfect cleavage planes, forming a cleavage fragment C) the typical crystal form of fluorite D) a pseudomorph (false form) of fluorite from replacement of a salt, potassium chlorite, that grows in octahedral crystals