BIO370Y5 Chapter Notes - Chapter 1: Unicellular Organism, Symbiogenesis, Phylogenetic Tree
Document Summary
Chapter 1: the evolution of microorganisms and microbiology. In february 2012, national aeronautics and space administration (nasa) reported that over 2000 planets were discovered by the 2009 kepler mission. Why is finding planets important for nasa: by finding planets, scientists can gather evidence to support or refute current models of planet formation. What are the current models of planet formation: they predict a process that is chaotic and violent. Planets are thought to begin as dust particles that circle around newly formed stars. These dust particles then collide with each other and form large chunks. Eventually, the collisions result in a planet sized body. Microbes appeared on earth the next billion years after it formed 4. 5 billion years ago: since then, microorganisms have evolved and diversified to occupy every habitat on earth (from oceanic geothermal vents to arctic ice) Cellular microorganisms have a diverse metabolic capabilities: some cellular microorganisms carry out respiration, like animals, some cellular microorganisms perform photosynthesis.
