The Origin of Cells

tiasabs
Mind Map by tiasabs , updated more than 1 year ago
tiasabs
Created by tiasabs about 6 years ago
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Mindmap of Topic 1.5 Origin of Cell of IB Biology Chapter 1 Cell Biology

Resource summary

The Origin of Cells
  1. Cell division and the origin of cells
    1. can only form by division of pre-existing cells
      1. all cells in our body came from a zygote
        1. the zygote formed through the fusion a sperm and egg cell
          1. our parents can be traced back to their zygotes
            1. this traces back millions of years and shows our origins
        2. cell artificially developed in 2010
          1. original theory was spontaneous generation
            1. disproved by Louis Pasteur
          2. Origin of the first cells
            1. must have arisen from non-living material
              1. theories
                1. production of carbon compounds
                  1. assembly of carbon compounds into polymers
                    1. Development of a mechanism for inheritance
                      1. Membrane formation
                    2. Endosymbiosis and eukaryotic cells
                      1. creation of eukaryotic cells explained by endosymbiotic theory
                        1. mitochodria - free living prokaryotic organisms
                          1. mit. developed aerobic processes
                            1. Larger anaerobic prokaryotes took them in by endocytosis
                              1. allowed them to live in cytoplasm
                                1. evolved to today's eukaryotic cells
                                  1. prok. features of mit. and chloroplasts
                                    1. circular molecule with genes
                                      1. prok. like 70S ribosomes
                                        1. transcribe own DNA
                                          1. use mRNA to synthesize own proteins
                                            1. only can be produced by division of pre-existing
                                          2. two prokaryotes in symbiotic relationship
                                            1. mutualistic
                                              1. food for mit.
                                                1. energy for large prok.
                                                2. natural selection
                                                  1. also applies to chloroplasts
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