<span>b they could eat unicellar organisms </span> Multicellular organisms arose because of the process called endosymbiosis. The endosymbiosis theory posits that other unicellular organisms ate other organisms which has benefitted them into processing new mechanisms and functions.
A Eukaryotic cell contains a nucleus; more than one chromosome and is typically a multi-celled organism. Both plant and animal cells are eukaryotic cells.
Interspecific competition (i.e. <span>competition among individuals in a population )</span> is most likely to occur when: MATING (i.e. seeking a partner of the opposite sex to reproduce with).
