Problem: Aspirated consonant:

Wu Chinese has a three-way distinction in stops and affricates: /p p b/. In addition to aspirated and unaspirated consonants, there is a series of muddy consonants, like /b/. These are pronounced with slack or breathy voice: that is, they are weakly voiced. Muddy consonants as initial cause a syllable to be pronounced with low pitch or light ( yang) tone.

What kind of voice are muddy consonants pronounced with?
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A: slack or breathy

Problem: Cork (city):

The most notable cricket club in Cork is Cork County Cricket Club, which was formed in 1874. Although located within the Munster jurisdiction, the club plays in the Leinster Senior League. The club plays at the Mardyke, a ground which has hosted three first-class matches in 1947, 1961 and 1973. All three involved Ireland playing Scotland. The Cork Cricket Academy operates within the city, with the stated aim of introducing the sport to schools in the city and county. Cork's other main cricket club, Harlequins Cricket Club, play close to Cork Airport.

Which league does the Cork County Cricket Club belong to?
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A: Leinster Senior League

Problem: Germans:

Roman Catholicism was the sole established religion in the Holy Roman Empire until the Reformation changed this drastically. In 1517, Martin Luther challenged the Catholic Church as he saw it as a corruption of Christian faith. Through this, he altered the course of European and world history and established Protestantism. The Thirty Years' War (16181648) was one of the most destructive conflicts in European history. The war was fought primarily in what is now Germany, and at various points involved most of the countries of Europe. The war was fought largely as a religious conflict between Protestants and Catholics in the Holy Roman Empire.

What religious war was fought in the 16th century?
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A: unanswerable

Problem: Symbiosis:

Adaptation of the endosymbiont to the host's lifestyle leads to many changes in the endosymbiontthe foremost being drastic reduction in its genome size. This is due to many genes being lost during the process of metabolism, and DNA repair and recombination. While important genes participating in the DNA to RNA transcription, protein translation and DNA/RNA replication are retained. That is, a decrease in genome size is due to loss of protein coding genes and not due to lessening of inter-genic regions or open reading frame (ORF) size. Thus, species that are naturally evolving and contain reduced sizes of genes can be accounted for an increased number of noticeable differences between them, thereby leading to changes in their evolutionary rates. As the endosymbiotic bacteria related with these insects are passed on to the offspring strictly via vertical genetic transmission, intracellular bacteria goes through many hurdles during the process, resulting in the decrease in effective population sizes when compared to the free living bacteria. This incapability of the endosymbiotic bacteria to reinstate its wild type phenotype via a recombination process is called as Muller's ratchet phenomenon. Muller's ratchet phenomenon together with less effective population sizes has led to an accretion of deleterious mutations in the non-essential genes of the intracellular bacteria. This could have been due to lack of selection mechanisms prevailing in the rich environment of the host.

What does the article say could be the reason for the buildup of harmful mutations?
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A:
lack of selection mechanisms