Which Soviet leader introduced new policies of glasnost and perestroika to allow a more democratic political system?
a. Gorbachev
b. Putin
c. Lenin
d. Stalin
e. Yeltsin
a
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One of the largest countries in Africa, Morocco's unstable environmental and political conditions have driven millions from their homes
Indicate whether the statement is true or false.
A hypothesis that explains how new organisms or new characteristics can appear suddenly in the fossil record is called
A. evolution. B. punctuated equilibrium. C. natural selection.
Glaciers form over land where temperatures are sufficiently low so that, during the course of a year, ____
a. ice crystallization does not occur b. snow will not accumulate c. snow compaction does not occur d. less snow falls than will melt e. more snow falls than will melt
Natural selection will ultimately make a species
A. Physically bigger B. More intelligent C. Less vulnerable to its predators D. Better adapted to its environment E. More aggressive