BIO 1130 Lecture 5: Hadean Eon Keywords
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BIO 1130 Full Course Notes
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The force of attraction between unlike molecules or the attraction between the surfaces of contacting bodies (cell binds to cell) Water is adhesive, meaning it is attracted to other substances. Subdivided into four eras: neoarchean, mesoarchean, paleoarchean and eoarchean. Earth"s crust has cooled by the start of this era and rocks and continental plates begin to form. Anaerobic bacterial life appears (first life) and oxygen begins to accumulate. Used to form sugars, nucleic acids and polypeptides. Creation of biomonomers in an experiment such as the miller experiment suggests that it would be possible for life to evolve from non-living matter. Made of multiple polymers by living organisms. Proteins, nucleic acids (dna & rna), chitin, cellulous, etc. Develop crust on earth and it cools down. Central to life (building block of life) Has four bonding sites, making it a perfect tetrahedron. Silica, though rare, is the next closest element with carbon-like properties.
