Why should all evidence be placed in separate containers?

Which of these statements are true about scientific theories and hypothesis

Flock x flock y flock z total pieces of food eaten (from previous page) 147 93 60 food percentage* % % % simulated number of birds in flock for 3rd generation** * divide each flock's total pieces of food by 300, the total number of pieces of food eaten. ** multiply the food percentage for each flock by the total number of birds (30).

Genetic disorders can result when sister chromatids fail to seperate properly. during what phase is this problem most likely to occur?