Now almost all bean sprouts have no roots, unless the bean sprouts cooked at home have roots. Nowadays, in order to make bean sprouts look better, vendors will add rootless agent (a food treatment agent) when they send bean sprouts again, so that bean sprouts will have no roots. As for the length, the longer the germination time, the longer the bean sprouts will be and the higher the yield will be. I hope you can understand this.