All life on earth has evolved from a single cell that could replicate itself. No wonder you find few things similar in all life forms like mitochondira. Yes, plants have mitochondria, which are organelles found in the cells of most eukaryotes, including plants, animals, and fungi. Mitochondria are responsible for integrating sugar produced in the cell to generate energy, usually during the day through photosynthesis. At night, plants continue to make energy through cellular respiration. All life is a sequence of A-G and C-T pairs which define the genetic code and decides if we are going to be a mouse, plant or a human being. All have persisted since roughly 3.7 billion to 3.5 billion years ago during the Archean Eon (4 billion to 2.5 billion years ago), products of the great evolutionary process with its identical molecular biological bases adenine, guanine, cytosine and thiamine. Based on commonality or differences all life was classified by Carl Linnaeus in 1753, a Swedish biologist named Carl Linnaeus (also known as Carl von Linné) proposed a universal system for classifying and naming animals and plants. Scientists still use this Linnean system to classify living things.