The meaning of this motif is quite obvious in the very first act. Simply, it means that appearances are often deceptive, and that things are different from what they appear to be. This line also points towards the play’s concern with the inconsistency between appearance and reality. Though it is a knotty and difficult idea, nevertheless it suggests that in this world, you can never be sure whether it is a mirage, an apparition, or a dagger.
Neither. Dormant and recessive are not synonyms because their definitions are not similar, nor are they antonyms because they aren't opposites, either. Dormant means to sleep. Recessive refers to a trait that is usually masked by a dominant trait.
Hope that answered your question.
I can only answer question 1.
1: One event that relates to this is when British soldiers shot upon colonial revolutionists. This lead to the American Revolution.
Answer:
Penicillin was discovered in 1928 by Alexander Fleming
