Ellen Johnson Sirleaf became the first elected female head-of-state in Africa in 2006. In which nation was she elected President?
A) South Africa
B) Democratic Republic of the Congo
C) Zimbabwe
D) Liberia
E) Tanzania
D) Liberia
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What can lithified or ancient sand dunes tell us? What will be an ideal response?
Why would a large concrete producing company be interested in the sea bed?
A) as a source of mud to mix with limestone to make Portland cement B) as a source of sand and gravel C) They can rape the sea bed without being prosecuted like they would in operating a quarry or gravel pit improperly. D) as a source of lime from sea shells
A prairie grass may experience grazing herbivores, wildfires, droughts, deep snow, or blazing hot days in the summer. Yet, those prairie grasses alive today are descendants of those that have survived these challenges and more
From an evolutionary perspective, these sorts of environmental challenges are identified as A) herbivory. B) predation. C) selective pressures. D) reproductive isolation.
We know from the Apollo missions and unmanned probes that the moon's surface is covered with loose, unconsolidated material with a texture similar to soil on earth. How did this material form on the moon?
A) The material is mostly volcanic ash ejected from volcanos that are no longer active. B) The loose material is mostly micrometeorite fragments and ejecta from impact craters, so is very different from soil on Earth. C) The material is produced by spalling from rock surfaces caused by the extreme heat-cold cycles as the moon rotates through a 1 lunar day, or approximately one Earth month. D) The same as Earth, but soils are ancient from a time when the moon still had an atmosphere and water.