Problem: From the early stages of Christianity, belief in the virginity of Mary and the virgin conception of Jesus, as stated in the gospels, holy and supernatural, was used by detractors, both political and religious, as a topic for discussions, debates and writings, specifically aimed to challenge the divinity of Jesus and thus Christians and Christianity alike. In the 2nd century, as part of the earliest anti-Christian polemics, Celsus suggested that Jesus was the illegitimate son of a Roman soldier named Panthera. The views of Celsus drew responses from Origen, the Church Father in Alexandria, Egypt, who considered it a fabricated story. How far Celsus sourced his view from Jewish sources remains a subject of discussion.
In what Egyptian city did Origen visit his Church Father?
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Answer: unanswerable

Problem: The fact that the 1912 exhibition had been curated to show the successive stages through which Cubism had transited, and that Du "Cubisme" had been published for the occasion, indicates the artists' intention of making their work comprehensible to a wide audience (art critics, art collectors, art dealers and the general public). Undoubtedly, due to the great success of the exhibition, Cubism became recognized as a tendency, genre or style in art with a specific common philosophy or goal: a new avant-garde movement.
What type of audience did the exhibition not appeal to?
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Answer: unanswerable

Problem: Digestive systems take many forms. There is a fundamental distinction between internal and external digestion. External digestion developed earlier in evolutionary history, and most fungi still rely on it. In this process, enzymes are secreted into the environment surrounding the organism, where they break down an organic material, and some of the products diffuse back to the organism. Animals have a tube (gastrointestinal tract) in which internal digestion occurs, which is more efficient because more of the broken down products can be captured, and the internal chemical environment can be more efficiently controlled.
What is the name of the tube that helps add in animal digestion?
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Answer:
gastrointestinal tract