Point sources of pollution
a. enter ecosystems from dispersed and often hard-to-identify sources
b. include runoff of fertilizers and pesticides from farmlands and suburban lawns
c. are cheaper and easier to identify than nonpoint sources
d. are more difficult to control than nonpoint sources
e. are always found in rural areas
C
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A) ADP B) AMP C) ATP D) None, they are all equally good.
Which mountain range consists of the youngest collisional mountains on Earth?
A) Himalayas B) Andes C) Grand Tetons D) Appalachians
The observation of a hill of water within all subtropical gyres is an example of which of the following?
A) Eastern intensification B) Equatorial upwelling C) Geostrophic current D) Subtropical convergence E) Western intensification
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A. 90 B. 80 C. 50 D. 70 E. 60