Caffeine's Main Physiological Effect in Humans Is on the ________

Q12: Which of the following is a beneficial

Q13: What part of the cacao plant is

Q14: The compound in chocolate that imparts that

Q15: There is conclusive evidence that moderate caffeine

Q16: What was used as a tea substitute

Q18: Caffeine belongs to a class of chemicals

Q19: The flavor and aroma of coffee depends

Q20: Which of the following is not correct?<br>A)Tea

Q21: This plant produces clusters of small,white flowers,its

Q22: Paraguay tea was a true tea substitute