Final answer:
Yes, the subsidiary motion to limit or extend debate is applicable to a series of debatable motions in legislative bodies, like the United States Senate, to manage discussion timeframes and prevent filibustering.
Step-by-step explanation:
The subsidiary motion to limit or extend limits of debate can indeed be applied to a series of debatable motions. In the context of the United States Senate, there is a practice known as unlimited debate, where senators can speak for as long as they want unless there's an agreement to create time limits. To end this unlimited debate and proceed to a vote, a cloture motion is required, which needs the support of 60 senators to be effective. Without such limits, debate continues until no one else seeks recognition or a motion to table is brought forward and voted on.
Such rules and procedural motions ensure that senators have the opportunity to thoroughly discuss legislation but also provide a mechanism to prevent filibustering, where debate is used to delay or block legislative action. In cases where it is deemed necessary to extend or limit debate on a series of motions, a subsidiary motion can be applied to effectively manage the discussion timeframe.