1.8 1.9 Stanley Miller mixed hydrogen, methane, ammonia, and water in a reaction chamber that recirculated the mixture and bombarded it with a spark discharge. Within a week, amino acids and other small organic compounds had been formed. (1) ANSWER: Without an oxygen-free atmosphere, the organic compounds that started the story of life never would have been formed on their own. Free oxygen would have attacked them. (1) ANSWER: 1.10 Much of the Earth's inner rocky material melted. (1) ANSWER: 1.11 Imagine an ancient sunlit estuary rich in clay deposits. Countless aggregations of organic molecules stick to the clay. (1) ANSWER: 1.12 In other experiments, fatty acids and glycerol combined to form long-tail lipids under conditions that stimulated evaporating tidepools. The lipids self-assembled into small, water-filled sacs, which in many instances were like cell membranes. (1) ANSWER: 1.13 We still don't know how DNA entered the picture. (1) ANSWER: 1.14 Rocks collected from Mars, meteorites, and the moon contain chemical precursors that must have b present on the early Earth. (1) ANSWER: 2
1.8 1.9 Stanley Miller mixed hydrogen, methane, ammonia, and water in a reaction chamber that recirculated the mixture and bombarded it with a spark discharge. Within a week, amino acids and other small organic compounds had been formed. (1) ANSWER: Without an oxygen-free atmosphere, the organic compounds that started the story of life never would have been formed on their own. Free oxygen would have attacked them. (1) ANSWER: 1.10 Much of the Earth's inner rocky material melted. (1) ANSWER: 1.11 Imagine an ancient sunlit estuary rich in clay deposits. Countless aggregations of organic molecules stick to the clay. (1) ANSWER: 1.12 In other experiments, fatty acids and glycerol combined to form long-tail lipids under conditions that stimulated evaporating tidepools. The lipids self-assembled into small, water-filled sacs, which in many instances were like cell membranes. (1) ANSWER: 1.13 We still don't know how DNA entered the picture. (1) ANSWER: 1.14 Rocks collected from Mars, meteorites, and the moon contain chemical precursors that must have b present on the early Earth. (1) ANSWER: 2
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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