BIOL1007 Lecture Notes - Lecture 8: Nicotinamide Adenine Dinucleotide Phosphate, Great Oxygenation Event, Chemical Energy
29 Nov 2018
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Document Summary
Thermonuclear reactions energy reaching the earth"s surface 13 x 1023 calories per year. 2/3 absorbed by the earth"s surface (most converted to heat) 1% of energy converted to chemical potential energy by plants. What really drives the process of life on earth - carbon cycle- plants and humans- changing the co2 concentration, land use Evolutionary events to maximize light capture by plants. Earliest ancestors of modern plants caused the "great oxidation event" Change the composition of atmosphere to allow life to evolve. Bacteria produced free oxygen in the atmosphere via photosynthesis (split water) - change the composition of atmosphere. At some point in the evolution, ancestral prokaryote engulf heterotrophic prokaryote produce mitochondrion( energy factory) Then, at some point in evolution, engulfing of photosynthetic prokaryote by eukaryote- in the direction of evolution of plants- means the exchange of radiant and chemical. O2 reacted in upper atmosphere to produce ozone-uv protection. Plants are wide-spread on land but still very simple morphology (form)
