Highlight the main changes introduced into the Nigerian Government by the 1963 Constitution

The 1963 Republican Constitution tried to take away the traces of colonialism hence a lot of changes were embedded in
the constitution. Some of the changes
are: 

• The Governor Genera! was now
  called the president who was no longer the representative of the queen. 
• The federal supreme court now
  became the-highest court of the land. Appeal to the
  judicial committee of the Privy council was abolished under the 1963 constitution.
•  Under the 1963 constitution the
  president was elected by the houses of Senate and
  Representative at a joint sitting. He held office for a period of
  five years.
•  Appointments  to 
  the  Judiciary  and 
  the  electoral Commission were made by the prime
  minister. The Judicial Service Commission was
  abolished under the 1963 constitution.