the endosymbiotic theory explains how eukaryotic cells may have evolved from prokaryotic cells. which two organelles are said to have been engulfed by this primitive prokaryotic, thereby creating eukaryotic cell

During an experiment, readings for blood pressure in a persons body were found to be constant . however , when he measured by a different blood pressure cuff , the readings differed by 15 points for each reading. this difference indicates that the results are