Problem: Insect:

Chemical communications in animals rely on a variety of aspects including taste and smell. Chemoreception is the physiological response of a sense organ (i.e. taste or smell) to a chemical stimulus where the chemicals act as signals to regulate the state or activity of a cell. A semiochemical is a message-carrying chemical that is meant to attract, repel, and convey information. Types of semiochemicals include pheromones and kairomones. One example is the butterfly Phengaris arion which uses chemical signals as a form of mimicry to aid in predation.

Kairomones are a type of what?
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A: semiochemicals

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.

Who believed the status of the offspring of mixed marriages was determined patrilineally in the Bible?
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A: Shaye J. D. Cohen

Problem: Compact disc:

In 2004, worldwide sales of audio CDs, CD-ROMs and CD-Rs reached about 30 billion discs. By 2007, 200 billion CDs had been sold worldwide. CDs are increasingly being replaced by other forms of digital storage and distribution, with the result that audio CD sales rates in the U.S. have dropped about 50% from their peak; however, they remain one of the primary distribution methods for the music industry. In 2014, revenues from digital music services matched those from physical format sales for the first time.

How many CDs had been distrubuted around the world by 2007?
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A: 200 billion

Problem: Warsaw Pact:

Memories of the Nazi occupation were still strong, and the rearmament of Germany was feared by France too. On 30 August 1954 French Parliament rejected the EDC, thus ensuring its failure and blocking a major objective of US policy towards Europe: to associate Germany militarily with the West. The US Department of State started to elaborate alternatives: Germany would be invited to join NATO or, in the case of French obstructionism, strategies to circumvent a French veto would be implemented in order to obtain a German rearmament outside NATO.

Which NATO country feared a unified and rearmed Germany?
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A:
France