BIOL1030 Study Guide - Swim Bladder, Hagfish, Symbiodinium
Document Summary
1. 8 million named species, of which 1 million are insects. We are currently experiencing the 6th great extinction. Life arose from non-life by processes of evolution. The evolutionary ideas arose from an accumulation of known data and processes. Life is composed of organised matter that is capable of undergoing reproduction and subjected to natural selection. For selection it must generate inheritable variables and produce excess offspring. Variation is encoded into genomes and allows selection for the fittest. Lower boundary: 1st point where life could have existed. Upper boundary: when life is definitely present, fossils and chemical records. Miller-urey, 1953, abiotic synthesis of molecules which produces an organic compound. Rna information carrier, natural selection in operation approx. Excess offspring each generation, only must suitable will survive. Humans diverged dramatically in appearance but didn"t speciate. If core requirements are present, selection will drive evolution as a powerful force. Had all the machinery of life in a membrane.
