The variety of terrestrial and aquatic ecosystems found in an area or on the earth is called ____ diversity.
A. species
B. ecological
C. functional
D. geological
E. genetic
Answer: B
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CAM plants
A) use energy sources at hydrothermal vents rather than sunlight to make food. B) sometimes conduct C4 photosynthesis and conduct C3 photosynthesis at other times. C) are those that are consumed by omnivores but not herbivores. D) are those that are consumed by herbivores but not omnivores.
Which of the following Acts prohibited dumping of waste materials into rivers without permits?
A) 1899 Rivers and Harbors Act B) 2006 REACH Act C) 1970 Resource Recovery Act D) 1980 CERCLA Act E) 1965 Solid Waste Disposal Act
The geothermal gradient is, on the average, about
A. 1°C/km B. 50°C/km C. 30°C/km D. 10°C/km
Most of the people on Singapore are:
A) ethnic Chinese B) of Portuguese ancestry C) Muslim D) Malayan E) none of these