Final answer:
Unable to answer the question about the number of executive presbyters due to lack of specific information, but provided answers to other social studies questions related to government structures, ancient Rome, the U.S. Supreme Court, and denominations of the Christian Protestant church.
Step-by-step explanation:
The question regarding the number of executive presbyters of the General Council does not have enough context or a specific organization mentioned to provide an accurate answer. Therefore, I'm unable to answer this question.
However, I can provide answers to the other provided questions:
- Approximately 25 percent of countries in the world have a unicameral legislature.
- In ancient Rome, the Council of Elders was part of the Senate.
- The Supreme Court of the United States consists of one chief justice and eight associate justices.
- Some denominations of the Christian Protestant church include Jehovah's Witnesses and Presbyterians, as well as Methodist and Seventh-day Adventist.