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
Defying thousands of years of conventional wisdom, scientists are reporting that it is possible for
Measurements of solar cycle variation during the last 30 years
Although average brain size increases gradually though time in H. erectus, individuals with small br
Average Number of Hours Slept per Day by Various Mammalian Species
The annual pattern of rings changes with ocean temperature and coral health
An antique painting is purchased in 1980 for $995. The value increases by 3.1% e