C, D) Cell proliferation is necessary for normal tissue morphology Follicle cell shape regularity (C) and polygonality (D) measurements in control and String-shRNA egg chambers of different aspect ratios. These measurements were derived from at least three egg chambers from at least three flies per AR range. Bars represent mean and standard deviation. Statistical significance for cell side distributions was calculated using a chi-squared test. Number of cells used for analysis: w1118 1.0-1.2 n= 23, 1.2-1.4 n=114, 1.4-1.6 n=160; String-shRNA 1.0-1.2, n=6, 1.2-1.4 n=19, 1.4-1.6 n=17 