Question: Ectosymbiosis, also referred to as exosymbiosis, is any symbiotic relationship in which the symbiont lives on the body surface of the host, including the inner surface of the digestive tract or the ducts of exocrine glands. Examples of this include ectoparasites such as lice, commensal ectosymbionts such as the barnacles that attach themselves to the jaw of baleen whales, and mutualist ectosymbionts such as cleaner fish.
Is there an answer to this question: What mutualist ectosymbionts clean the barnacles that attach themselves to the jaw of baleen whales?

Answer: unanswerable

Question: The Dutch Republic, also known as the Republic of the Seven United Netherlands (Republiek der Zeven Verenigde Nederlanden), Republic of the United Netherlands or Republic of the Seven United Provinces (Republiek der Zeven Verenigde Provincien), was a republic in Europe existing from 1581, when part of the Netherlands separated from Spanish rule, until 1795. It preceded the Batavian Republic, the Kingdom of Holland, the United Kingdom of the Netherlands, and ultimately the modern Kingdom of the Netherlands. Alternative names include the United Provinces (Verenigde Provincien), Federated Dutch Provinces (Foederatae Belgii Provinciae), and Dutch Federation (Belgica Foederata).
Is there an answer to this question: The Dutch Republic was a republic of Europe during what time?

Answer: from 1581, when part of the Netherlands separated from Spanish rule, until 1795

Question: Avignon was the seat of the papacy from 1309 to 1376. With the return of the Pope to Rome in 1378, the Papal State developed into a major secular power, culminating in the morally corrupt papacy of Alexander VI. Florence grew to prominence amongst the Italian city-states through financial business, and the dominant Medici family became important promoters of the Renaissance through their patronage of the arts. Other city states in northern Italy also expanded their territories and consolidated their power, primarily Milan and Venice. The War of the Sicilian Vespers had by the early 14th century divided southern Italy into an Aragon Kingdom of Sicily and an Anjou Kingdom of Naples. In 1442, the two kingdoms were effectively united under Aragonese control.
Is there an answer to this question: What were the names of the two kingdoms into which southern Italy was divided?

Answer: Aragon Kingdom of Sicily and an Anjou Kingdom of Naples

Question: Charleston has a humid subtropical climate (Koppen climate classification Cfa), with mild winters, hot, humid summers, and significant rainfall all year long. Summer is the wettest season; almost half of the annual rainfall occurs from June to September in the form of thundershowers. Fall remains relatively warm through November. Winter is short and mild, and is characterized by occasional rain. Measurable snow (0.1 in or 0.25 cm) only occurs several times per decade at the most, with the last such event occurring December 26, 2010. However, 6.0 in (15 cm) fell at the airport on December 23, 1989, the largest single-day fall on record, contributing to a single-storm and seasonal record of 8.0 in (20 cm) snowfall.
Is there an answer to this question: What is Charleston's seasonal record of windfall?

Answer:
unanswerable