The answer depends on how far back you go. The 24-character alphabet used by Modern Greek was officially adopted by the city of Athens in 403 B.C. As a point of reference, the Athenian philosopher...
If you are talking in the strictest sense, all 26 letters of the Latin alphabet are not in the Greek alphabet.If you are talking about letter shapes, the following shapes do not occur in Greek: C D F...
No, Greek is the language of the Greeks; Latin was the language of the Romans.
Latin forms the root of several modern languages including Spanish, Portugese, Italian, French, and Romanian