Final answer:
A committee comprising both House and Senate members is referred to as a joint committee, which is established to focus on major issues between both houses without bill referral authority.
Step-by-step explanation:
A committee comprising both House and Senate members is often referred to as a joint committee. Joint committees are established to conduct business between the two houses and to help focus public attention on major issues. They do not have bill referral authority, meaning they cannot send bills to the floor for a vote, but provide analysis and advice on important issues such as the economy and taxation. A select committee, on the other hand, is different from a standing committee in that it is convened for a specific and temporary purpose, while a standing committee is a permanent part of the legislative structure.