[Solved] Some parasites and disease agents regularly change their identity before our immune system can build up substantial antibodies.How can cells change their chemical identity on a regular basis? A)Rapid evolution produces mutations. B)A new phospholipid bilayer is generated to replace the old layer. C)Because the membrane is "set," the cell must reproduce and then the cell with the old membrane must die. D)Cells eliminate all surface proteins and present only a naked lipid bilayer. E)Different glycolipids and glycoproteins are produced internally and moved into the plasma membrane. MEDIAN(data range): A statistical measure that represents the middle value in a given set of numbers when they are arranged in order. kth Percentile: Represents the value below which a specified percentage (k) of observations in a group of observations fall. Observations: Data collected during an experiment or survey. They are individual instances of the data collected. Frequency Distribution: A statistical representation showing the number of observations within specified intervals, commonly used to visualize data distributions.