The purines have two rings in their structure while the pyrimidines have hust one
Answer:
The Witches
Explanation:
The Witches Tell
In Macbeth, the witches in Act I foretell the future of Macbeth as king and Banquo as the first of a line of kings. In Act IV, the witches foreshadow Macbeth's downfall.
What organ system are you talking about