Biology 2581B Study Guide - Quiz Guide: Microbial Metabolism, Phylogenetic Tree, Chloroplast
3 Jun 2020
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Microbial trees of life: what are microbes: Too small to be seen by the naked eye (<1mm) Term encompasses all microscopic cellular organisms (bacteria, archaea, unicellular protists, fungi and viruses: early evolution. The common pathway for the flow of information suggests that all living organisms share a common ancestor all major domains follow the same structure. Oceans of liquid water formed 4 billion years ago. Common belief today is that life first formed in deep-sea hydrothermal vents. Life arose from gases with energy from harnessing geochemical gradients created as a vent. Would have provided a steady and abundant supply of energy in form of reduced compounds. First molecules to arrive are thought to be rna as it can have catalytic properties. Proteins emerged later that took over the catalytic role of the rna. Dna may have taken over the role of coding information as it is more stable.
