Context and question: Up until the mid-14th century, Europe had experienced steadily increasing urbanisation. Cities were also decimated by the Black Death, but the role of urban areas as centres of learning, commerce and government ensured continued growth. By 1500, Venice, Milan, Naples, Paris and Constantinople each probably had more than 100,000 inhabitants. Twenty-two other cities were larger than 40,000; most of these were in Italy and the Iberian peninsula, but there were also some in France, the Empire, the Low Countries, plus London in England.
What event decimated urban populations in the 13th century?
Answer: unanswerable
Context and question: Bacteria, as asexual organisms, inherit identical copies of their parent's genes (i.e., they are clonal). However, all bacteria can evolve by selection on changes to their genetic material DNA caused by genetic recombination or mutations. Mutations come from errors made during the replication of DNA or from exposure to mutagens. Mutation rates vary widely among different species of bacteria and even among different clones of a single species of bacteria. Genetic changes in bacterial genomes come from either random mutation during replication or "stress-directed mutation", where genes involved in a particular growth-limiting process have an increased mutation rate.
What can cause mutation in bacteria?
Answer: changes to their genetic material DNA
Context and question: The term also has closely related synonyms that are employed throughout the Quran. Each synonym possesses its own distinct meaning, but its use may converge with that of qurʼān in certain contexts. Such terms include kitāb (book); āyah (sign); and sūrah (scripture). The latter two terms also denote units of revelation. In the large majority of contexts, usually with a definite article (al-), the word is referred to as the "revelation" (waḥy), that which has been "sent down" (tanzīl) at intervals. Other related words are: dhikr (remembrance), used to refer to the Quran in the sense of a reminder and warning, and ḥikmah (wisdom), sometimes referring to the revelation or part of it.
What name does the Quran use for itself that means "revelation"?
Answer:
waḥy