Agile Adoption is successful when teams are persistent, cross functional and sized per agile best practices. A team member is representing a single team, and cannot be part of multiple teams.
There is single owner for representing business needs on the team. There is a single owner for facilitation for all ceremonies, unblocking impediments and helping team adopt agile best practices.
The cross functional team has the required skills to plan, develop and release the work items identified in the team backlog. All team members work in the same time zone. Persistent teams are highly motivated and produce quality products that delight customers.