PHYS 037 Lecture Notes - Lecture 16: Mitochondrion, Cellular Respiration, Phospholipid
6 Dec 2016
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What is life: self-replicating molecules, how do we de ne life, de ned by 2 characteristics. Ability to carry out some sort of metabolism. Early attempts at understanding: ancient cultures believed life could be generated from non-living matter, later experimental evidence proved that life can only come from other living things, francis redi (1668) (spontaneous generation) (biogenesis) 2 jars with decaying meat, both exposed to atmosphere: 1 covered in gauze, no ies, no maggots, 1 uncovered, flies settles on meat, maggots appear on meat. Placed fermentable sugar solution in a ask with a swan neck: mixture and ask boiled to kill prganisms in solution, pasteur postulated, louis pasteur (1861) Possibly arrived from extraterrestrial sources via meteorites: mars https://emailucr-my. sharepoint. com/personal/nyree_catlin_email_ucr_edu/_layouts/15/wopiframe. aspx?sourcedoc={c82d6fc0-8c22-4d0b-9da7-2a2b2b3a1269}&acti 1/4. Goldilocks planets: smaller rocky planets that fall within a star"s habitable zone and might support life, have been discovered in recent years in other solar systems, origin for life on earth.
