It has a mayor is NOT a characteristic of the Maryland General Assembly
Step-by-step explanation:
There are 188 members in General Assembly, with senators and delegates. One senator and three delegates are elected from any of the legislative election districts. The citizen of Maryland can be a senator or delegate and they must be a citizen for at least one cycle leading the time of the election.
A Speaker Pro Tem is selected first, who commands over the selection of the Speaker of the House and administers the House Speaker's promise of office. The Senate President and House Speaker each appoint a Majority Leader with whom they consult on the selection of a Majority Whip and Deputy Majority Leader.
From these it is clear that Mayor is not a part in a Maryland General Assembly.