國立臺灣大學農藝學系Wang, Yue-WenYue-WenWang2006-09-282018-07-112006-09-282018-07-112000http://ntur.lib.ntu.edu.tw//handle/246246/20060928155400551. Endosymbiosis is believed to account for mitochondria and chloroplasts. a. Mitochondria appear to be derived from a photosynthetic purple nonsulfur bacterium that entered a eukaryotic cell about a billion (109) years ago. They provide oxidative phosphorylation to the cell. b. Chloroplasts appear to derive from entry of a photosynthetic cyanobacterium. 2. Many proteins of both mitochondria and chloroplasts are encoded by nuclear genes, indicating that genes have moved from the organelles to the nuclear DNA.application/ppt2046976 bytesapplication/vnd.ms-powerpointzh-TWlearning objecthttp://ntur.lib.ntu.edu.tw/bitstream/246246/2006092815540055/1/0ch15.ppt