Food clearing assay. Worms of the indicated genotype were used to set up a food clearing assay. The "#" indicates plates where only one worm was used. In all other cases, two worms were used for the assay. spe-40(it133) takes a significantly longer time to clear a spot of food than fer-14(hc14) animals. p-Value is < 0.001 for worms marked with "a" (significantly different from the spe-40 animals, Student's t-Test).