Glacier ice occupied about ____% of Earth's land during the last Ice Age, then began retreating about 17,000 years

ago. Today, glacier ice occupies about ____% of the land surface.
a. 30; 10.
b. 50; 10
c. 73; 50
d. 80; 50
e. 15; 1


a

Biology & Microbiology

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Changes in ________ represent the predominant cause for biological evolution.

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