Colony collapse disorder
A) affects ant colonies, leaving most of the workers dead in the hive.
B) has been traced to poisoning by organophosphate pesticides.
C) is thought to be caused by a combination of pesticides, pathogens, hive pests or other synergistic toxic chemicals affecting honey bees.
D) is not a threat to U.S. crops because other unaffected pollinators will replace ants and bees.
C
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The term "salinity" refers to the total quantity of ____
A) dissolved inorganic solids in water B) sodium chloride dissolved in the ocean C) chlorine in 1 kilogram of water D) chloride ions in ocean water
____________________ in jawless fish eventually developed into jaws
Fill in the blank(s) with correct word
Golf serves as a good example of
A) popular cultural preferences imposing a particular landscape without regard to environment. B) a folk sport requiring relatively little equipment. C) a sport with more courses in warm, sunny places than cool or wet locations. D) the relocation diffusion of popular sports. E) a sport invented in the 20th century to make better use of the outdoors.
The process by which natural vegetation at a particular location develops in a sequence of stages involving different plant communities is known as:
a. evolution. b. regression. c. natural selection. d. succession.