The source of sulfur in coal is from all of the following except
A. sulfurous fumes from volcanism.
B. pyrite (iron sulfide) in the coal.
C. sulfur in the organic matter itself.
D. pyrite in shales associated with the coal.
Answer: A
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A baby born today in sub-Saharan Africa can expect to live on average to age 57. What are the two main factors that influence this relatively short lifespan expectation?
A) nutrition, medical services B) nutrition, education C) medical services, stress levels D) medical services, industrial accidents E) environmental toxicity, nutrition
Metal fabrication plants are an example of a bulk-gaining industry because
A) the mills are near the mines. B) separate parts are combined to make more complex and massive products. C) refineries import most material from other countries. D) parts suppliers package shipments in bulk containers for processing in the plants. E) parts suppliers supply components with just-in-time management.
Approximately how many birds are killed each year by pesticides?
A. 67 million B. none C. 10 million D. 37 million
The development of similar characteristics in separate but closely related organisms is called
____________. Fill in the blank(s) with the appropriate word(s).