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Q12: Experiments like those performed by Stanley Miller
Q24: The distribution of major biomes is controlled
Q39: Clay compounds were thought to be original
Q51: Most of the Earth's phosphorous is in
Q72: What holds a moss plant in place
Q77: AIDS kills about _ million people each
Q95: Which of the following flowering plant structures
Q110: Many ferns live on other plants without
Q125: From which of the following did humans
Q143: Of the following invertebrate groups, the group