ll arose—one tle bodies collectively calledorganelles (from a Greek tle tools”). t to artederium eitured by someoterium and it turned out t ted tive bacterium became, itis t, a mitococic event, asbiologists like to term it) made complex life possible. (In plants a similar invasion producedcs, o posyntoce oxygen in a  liberates energy from foodstuffs. ittily facilitating trick, life on Eartoday ociny—you could pack a billion into t also very  every nutriment you absorb goesto feeding them.

    e couldn’t live for tes  t even after a billion years mitoc not  betain their own DNA.

    t a different time from t cell. teria, divide likebacteria, and sometimes respond to antibiotics in teria do. In s, t even speak tic language as they live.

    It is like ranger in your  one where for a billion years.

    type of cell is knoe (meaning “truly nucleated”), as contrastedype, ed”), and it seems to  eukaryotes yet knos in Mic once, andthen no more are known for 500 million years.

    Compared es tes tle more t Stepes uallyas mucen times bigger—times more DNA. Gradually a system evolved in ypes of form—organisms t expel oxygen (like plants) and t take it in (you andme).

    Single-celled eukaryotes ozoa (“pre-animals”), but t term isincreasingly disdained. today term for tists . Compared eria t ists ion.

    t one cell big and  any ambitions but to exist, contains 400million bits of genetic information in its DNA—enouged, to fill eightybooks of five hundred pages.