Problem: Great Plains:

During the Cenozoic era, specifically about 25 million years ago during the Miocene and Pliocene epochs, the continental climate became favorable to the evolution of grasslands. Existing forest biomes declined and grasslands became much more widespread. The grasslands provided a new niche for mammals, including many ungulates and glires, that switched from browsing diets to grazing diets. Traditionally, the spread of grasslands and the development of grazers have been strongly linked. However, an examination of mammalian teeth suggests that it is the open, gritty habitat and not the grass itself which is linked to diet changes in mammals, giving rise to the "grit, not grass" hypothesis.

about how long ago did the climate become favorable?
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A: about 25 million years ago


Problem: Jews:

According to historian Shaye J. D. Cohen, the status of the offspring of mixed marriages was determined patrilineally in the Bible. He brings two likely explanations for the change in Mishnaic times: first, the Mishnah may have been applying the same logic to mixed marriages as it had applied to other mixtures (Kil'ayim). Thus, a mixed marriage is forbidden as is the union of a horse and a donkey, and in both unions the offspring are judged matrilineally. Second, the Tannaim may have been influenced by Roman law, which dictated that when a parent could not contract a legal marriage, offspring would follow the mother.

What did Roman law dictate if a parent contracted a legal marriage?
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A: unanswerable


Problem: Incandescent light bulb:

In flood lamps used for photographic lighting, the tradeoff is made in the other direction. Compared to general-service bulbs, for the same power, these bulbs produce far more light, and (more importantly) light at a higher color temperature, at the expense of greatly reduced life (which may be as short as two hours for a type P1 lamp). The upper temperature limit for the filament is the melting point of the metal. Tungsten is the metal with the highest melting point, 3,695 K (6,191 °F). A 50-hour-life projection bulb, for instance, is designed to operate only 50 °C (122 °F) below that melting point. Such a lamp may achieve up to 22 lumens per watt, compared with 17.5 for a 750-hour general service lamp.

What temperature does a typical 60-hour-life projection bulb operate?
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A: unanswerable


Problem: Institute of technology:

In Turkey and the Ottoman Empire, the oldest technical university is Istanbul Technical University. Its graduates contributed to a wide variety of activities in scientific research and development. In 1950s, 2 technical universities were opened in Ankara and Trabzon. In recent years, Yildiz University is reorganized as Yildiz Technical University and 2 institutes of technology were founded in Kocaeli and Izmir. In 2010, another technical university named Bursa Technical University was founded in Bursa. Moreover, a sixth technical university is about to be opened in Konya named Konya Technical University.

What institute of technology opened in Bursa in 2010?
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A:
Bursa Technical University