Question: It is fairly clear that predators tend to lower the survival and fecundity of their prey, but on a higher level of organization, populations of predator and prey species also interact. It is obvious that predators depend on prey for survival, and this is reflected in predator populations being affected by changes in prey populations. It is not so obvious, however, that predators affect prey populations. Eating a prey organism may simply make room for another if the prey population is approaching its carrying capacity.
Try to answer this question if possible: What is reduced in a predator species if it reaches carrying capacity?
Answer: unanswerable
Question: The Universal Film Manufacturing Company was incorporated in New York on April 30, 1912. Laemmle, who emerged as president in July 1912, was the primary figure in the partnership with Dintenfass, Baumann, Kessel, Powers, Swanson, Horsley, and Brulatour. Eventually all would be bought out by Laemmle. The new Universal studio was a vertically integrated company, with movie production, distribution and exhibition venues all linked in the same corporate entity, the central element of the Studio system era.
Try to answer this question if possible: Where was the Universal Manufacturing Film Company incorporated? 
Answer: unanswerable
Question: BeiDou-1 is an experimental regional navigation system, which consists of four satellites (three working satellites and one backup satellite). The satellites themselves were based on the Chinese DFH-3 geostationary communications satellite and had a launch weight of 1,000 kilograms (2,200 pounds) each.
Try to answer this question if possible: Which navigational system is regional and consists of five satellites? 
Answer: unanswerable
Question: Control of labour and inter-group conflict is characteristic of corporate-level or 'tribal' groups, headed by a charismatic individual; whether a 'big man' or a proto-chief, functioning as a lineage-group head. Whether a non-hierarchical system of organization existed is debatable, and there is no evidence that explicitly suggests that Neolithic societies functioned under any dominating class or individual, as was the case in the chiefdoms of the European Early Bronze Age. Theories to explain the apparent implied egalitarianism of Neolithic (and Paleolithic) societies have arisen, notably the Marxist concept of primitive communism.
Try to answer this question if possible: What type of disagreement existed in tribal groups that were controlled by Neolithic groups?
Answer:
unanswerable