The Roman Alphabet | 7th century BC

What was the basis of the Roman uppercase alphabet?
A variant of the Greek alphabet.What were the purposes of the formal and informal styles of lettering?
A rigid, formal style was used for manuscripts and important documents while  a quicker, informal style was used for letters and routine types of writing. 
Why is the Roman alphabet the most widely used and what contributions did it make?
It started the usage of the baseline in typography.It started the concept of perfectly aligning text in rows. This alphabet is most widely used because it conveniently allows for uppercase and lowercase letters.
From where did serifs originate?
It originated with the carving of words into stone.
When and where did lowercase, or minuscule, letters develop?
It originated in Greece in 7th century.
What is a ligature and why were they utilized?
A ligature is when two identical letters seem to come together in a piece of text. They were utilized to improve the appearance of characters that came together.
Post an example of the Roman alphabet in visual form.