High rates of species extinction caused by human activity have taken place at which of the following times in earth's history? i. at the end of the permian period
ii. at the end of the cretaceous period
iii. during recent times
a. i only
b. ii only
c. iii only
d. i and ii only
e. i, ii, and iii
Answers: 1
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High rates of species extinction caused by human activity have taken place at which of the following...
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