BIOL101 Study Guide - Final Guide: Eukaryote, Polytomy, Branch Point
Document Summary
Eukaryotes: the infolding of the plasma membrane developed into a nucleus for the cells, the evolved organism engulfs an anaerobic organism that is good at creating energy. In time, this becomes a symbiotic relationship: not all eukaryotes have plastids,it is believed that this relationship evolved after the evolution of the mitochondrion. The fossil record reveals changes in history of the life on earth. For instance, fossilised stromatolites indicate that prokaryotes probably existed around 3. 9 billion years ago. As well, they show early eukaryotic organisms around 2. 1 billion years ago. The geologic record was aided by the fossil records because it helped establish the geological record. Eukaryote- membrane, cytoplasm, organelles, nucleus has the dna. Origin of life: synthesis of small organic molecules joining into macromolecules. Earth"s early atmosphere was primarily water and chemicals released from volcanic eruptions. Inorganic compounds then reacted to form organic compounds: packaging of molecules into protocells or protobionts .
