In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.

Q: "Toy" and "toe" are two orthologs of the PAX6 gene in Drosophila named for their influence on the development of these structures. In insects and millipedes, these structures are made of clusters of hexagonal ommatidia, and rhodopsin is a pigment found in these organs. The(*) hyaloid canal passes through the vitreous humor in this organ, and rods and cones are specialized neurons found in the retina in this organ. For 10 points, name this organ in which the iris controls the passage of light through the pupil and toward the lens.

A: Social Science
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Q: In the aria Mal reggendo, one character in this opera relates how a strange voice stopped his hand from killing his opponent in a duel in Act 1. The arias Di due figli and Abbietta zingara are used by one character to narrate a ghost story to a gathering which is dispersed by the ringing of a bell. In Prima che d'altri vivere, the protagonist bids farewell to his lover after she poisons herself. After the first act in which Ferrando conjures the image of a baby burnt alive on a pyre, Chi del gitano i giorni abbella, or the Anvil Chorus, is sung by a group of gypsies. After the death of Leonora, the mother of Azucena is avenged when Count di Luna orders the execution of the title character Manrico. FTP, name this opera by Giuseppe Verdi.

A: Fine Arts
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Q: An early theory of the origin of these involved the breakup of relativistic "beebees" while Meszaros and Rees proposed the relativistic fireball shock model to explain their non-thermal broken power law spectrum. Woosely and Paczynski proposed that they are explicable by the collapsar model for Wolf-Rayet stars, which form black holes that feed an electron-positron-baryon jet. First detected by Vela military satellites, their afterglow was first observed by the BeppoSAX satellite using an x-ray detector and data from NASA's Compton Observatory showed they originate from far outside the Milky Way. FTP, identify these astronomical phenomena classified either as long- or short-duration depending if they last over two seconds and named for their intense output of high-energy photons.

A:
Science
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