The largest mass extinction of all time occurred at the end of the _____ Period of the Paleozoic Era.
A) Permian
B) Pennsylvanian
C) Ordovician
D) Devonian
Ans: A) Permian
Environmental & Atmospheric Sciences
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Indicate whether the statement is true or false
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In addition to the carboxyl group, which of the following functional groups is found in the fatty acids found in triglycerides?
A) amino B) carbonyl C) hydroxyl D) none of these
Environmental & Atmospheric Sciences
How do we reduce eutrophication?
What will be an ideal response?
Environmental & Atmospheric Sciences
Bangladesh's economic development was minimal until the
A. 1890s B. 1920s C. 1950s D. 1970s
Environmental & Atmospheric Sciences