Q: they lived their lives without internet and cell phones. instead, they had to worry whether there was enough tinned food and water in the emergency shelter of their apartment building and whom they could trust in case of an emergency, if the cold war would suddenly turn hot.

A: They lived their lives without internet and cell phones. Instead, they had to worry whether there was enough tinned food and water in the emergency shelter of their apartment building and whom they could trust in case of an emergency, if the Cold War would suddenly turn hot.
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Q: the main problem in this area is to find a nonsingular algebraic variety u, that is birationally equivalent to an irreducible algebraic variety v, such that the mapping f: u v is regular but not biregular.

A: The main problem in this area is to find a nonsingular algebraic variety U, that is birationally equivalent to an irreducible algebraic variety V, such that the mapping f: U V is regular but not biregular.
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Q: [page] 549 interminable number of intermediate forms must have existed, linking together all the species in each group by gradations as fine as are our present varieties, it may be asked, why do we not see these linking forms all around us? why are not all organic beings blended together in an inextricable chaos?

A:
[page] 549 interminable number of intermediate forms must have existed, linking together all the species in each group by gradations as fine as are our present varieties, it may be asked, Why do we not see these linking forms all around us? Why are not all organic beings blended together in an inextricable chaos?
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