Most of the existing orders of mammals were present by the
a. Paleocene. d. Oligocene.
b. Eocene. e. Miocene.
c. Late Cretaceous.
D
Environmental & Atmospheric Sciences
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On a summer evening at middle latitudes, twilight adds about how much time to the length of daylight?
A. 2 minutes B. 5 minutes C. 30 minutes D. 2 hours
Environmental & Atmospheric Sciences
What proportion of sulfur compounds in the atmosphere come from natural sources?
A) 1/10 B) 1/5 C) 1/3 D) 2/3
Environmental & Atmospheric Sciences
Which of the following is considered point source pollution?
A) Fertilizers from lawns B) Municipal sewage sludge C) Pesticides from agriculture D) Road oil from automobiles E) Trash washed down storm drains
Environmental & Atmospheric Sciences
MRSA is an example of
A. a highly toxic and bioaccumulating substance B. antibiotic resistant bacteria C. one of the many regulations that the EPA enforces D. Marine Response and Safety Association
Environmental & Atmospheric Sciences