GIVING AWAY MY 1469 points IN PORTIONS! (40 THIS TIME) What color is the sky? lol

they are easy questions because I want to give away my points!

Prior to the development of dna fingerprinting, blood type could be used to determine possible parentage. although it might prove someone was not a parent, it could not show if someone was positively the parent, only that he or she might be a parent. which of the following is a true statement that can be made about parentage based on blood typing?

Some birds look for food near cattle and other livestock. the movement of the cattle churns up the ground, making insects available to the birds. the cattle appear to be unaffected by the presence of the birds. what kind of relationship exists between the birds and the cattle? o a. parasitism o b. commensalism o c. predation o d. mutualism

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