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Q6: Research suggests that _ tend to hold
Q8: Carbohydrates are manufactured in green plants by<br>A)
Q10: The magnetizations of ocean-floor rocks alternate in
Q12: Each step of 1 on the Richter
Q20: A long chain of identical simple molecules
Q21: Most caves are due to<br>A) gas bubbles
Q36: The stars in the universe are<br>A) approximately
Q36: Survey data reveal that about _ of
Q36: The sun will remain its present size
Q49: Planetary systems are probably<br>A) very rare in