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Which of the following regions has what is considered the most rugged terrain in oklahoma? a. the wichita mountains b. the arbuckle mountains c. the sandstone hills d. the ouachita mountains

Which theory suggested that the earth was once a signle supercontient that gradually that broke up into the contients that we know today

In the following diagram, four different index fossils are labeled: which of the labeled fossils comes from the oldest organism? a b c d