The endangered orangutan is mainly threatened because ____.
A. its food source is being eliminated
B. it is hunted for bushmeat
C. its habitat in Borneo is disappearing
D. it is subject to poaching
E. it is sensitive to pollution
Answer: C
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In the map below, pink represents
A) subtropical scrub and woodland.
B) desert.
C) rain forest.
D) grassland.
The Clean Air Act
A. set national ambient air quality standards for six pollutants. B. set voluntary air quality standards for 187 pollutants. C. provided funding to States to regulate air pollution. D. provided tax incentives and grants for voluntary clean-up of air pollution.
The core of a comet is composed of
A. molten iron B. liquid hydrogen C. frozen gases and dust D. uranium
Which of the following is not very resistant to solution in water?
A) Sodium B) Iron C) Aluminum D) Silicon E) Diamond