GGR101H1 Lecture Notes - Lecture 4: Late Devonian Extinction, Late Glacial, Great Oxygenation Event
20 Apr 2016
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O supereons (higher: eons, epochs, ages, periods (lower, phanerozoic (eon, precambrian (supereon) From the formation of or planet to the first hard-bodied organisms. Made up of the following eons: hadean (oldest, archean, proterozoic (youngest) Not well understood little remains of the precambrian world. Ancient and modern theories of the origins of life on planet earth: aristotle. 1st 17th century middle east and europe. Spontaneous generation maintained: louis pasteur (19th century) Ggr101 the environmental prequel: from our earliest ancestors to the late glacial maximum. History of our planet divided into groupings (time: other models. Two flasks, one covered, one not, the one uncovered has not bacterial growth. Demonstrated that amino acids may have emerged this way. So how did amino acids turn into life? (still a question today) Division based on gene structure and dna transfer. Origins of sexual reproduction: eukaryotes, 1200mya, advantages of sexual reproduction. Quick removal of harmful mutation or variation. The first great extinction: great oxygenation event.
