The Oak Tree: The Concept of “Xylem Vessels” and “Cambium”, the Defensive Capabilities of the Oak Tree, the Main Defensive Strategy Oak Trees Utilize to Defend From Predation, the Reason Tea Has a Bitter Flavor Profile, How Tannins Produce a Bitter Flavor Profile, How Tannins Arrest the Development of Insects, How the Gall Wasp Leverages the Oak Tree to Reproduce, How This Strategy Works, the Hypothesis of How the Gall Wasp Exploits the Oak Tree for Reproduction, the Importance of the Andricus Kollari Wasp (Oak Marble Gall Wasp) for Human Beings Throughout History, How Ink Was Traditionally Manufactured Within Europe Between the 5th Century and the 19th Century, the Most Important Type of Ink Utilized by Europeans During the Past Millenia, Notable Works Produced Utilizing Iron Gall Ink, the Impact of the Oak Tree Upon Human History, the Requirement of All Scotch Whiskey, the Reason Plants are Green, How Chloroplasts Work, the Length of Time the Earth Was Inhabited by Simple Single Celled Life Forms, the Period When Chloroplasts Evolved and Developed, How Chloroplasts Helped Aid Plants to Become More Complex, and the Emergence of Various Complicated Life Forms Upon Earth