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: This structure does not function correctly in those with Stargardt disease, and certain cells in the capillaries of this structure can cause Scheerer's phenomenon. Muller glial cells found in this structure can dedifferentiate into multipotent progenitor cells, and Tay-Sachs disease is often diagnosed by a red spot on it. This structure receives oxygen from the choroid coat, which separates it from the (*) sclera. This structure's most sensitive region is the fovea, which is located at the center of its macula. Vitamin A is necessary for the function of this structure, which has a "blind spot" where it connects to the optical nerve. Rods and cones are found in, for ten points, which inner layer of the eye that sends optical signals to the brain

A: Science
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Q: In one story, this man saved the town of Gubbio by making a pact with an attacking wolf. After spending time as a Perugian captive, he saw a vision of a hall full of cross-marked armor, which encouraged him to travel to Apulia. After 40 days' fasting on the mountain La Verna, he saw a six-winged seraph, after which he received the stigmata, according to his namesake Fioretti. He praised Sister Death, Brother Fire, and Brother Moon in his Canticle of the Sun, and was credited with inventing the Nativity creche scene. For 10 points, identify this Catholic patron saint of animals, the founder of a namesake group whose first two orders are the Poor Clares and the Friars Minor.

A: History
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Q: This quantity's eigenfunctions are complex exponentials with a constant factor of one divided by quantity "2 pi times h-bar" all raised to the three-halves power. In Planck units, this quantity is given by the square root of h-bar times speed of light cubed divided by the universal gravitational constant. The time derivative of its expected value appears on one side of Ehrenfest's theorem. This quantity is squared in the quantum operator for kinetic energy; its own operator is equal to h-bar divided by i times the gradient. For massless particles, special relativity gives this quantity as energy divided by the speed of light. If position is precisely known, this quantity cannot be according to Heisenberg's uncertainty principle. For 10 points, name this conserved quantity equal to mass times velocity.

A:
Science
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