During the first 20 years of recycling (from 1960 to 1980), the average annual increase in recycling was approximately ________.
A) 80 million tons/year
B) 1 million tons/year
C) 20 million tons/year
D) 10 million tons/year
E) 8.0 million tons/year
Question 2
Conservation biologists define a region as a biodiversity hotspot if ________.
A) there is an endemic species protected by a captive breeding program
B) species richness is unusually high and protection is required
C) there is an unusually large number of endemic species threatened by humans
D) there is an unusually large number of endemic species thriving
E) there is at least one umbrella species to be protected
The Upper Cave at Zhoukoudian yields ages of about 25,000 years for Homo sapiens.
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A pedigree for albinism collected in the early years of the twentieth century by Charles Davenport,
Average Precipitation Acidities and the Effects of Acid Rain