What holds the DNA, and controls the functions of eukaryotic cells?

If the frequency of the p allele is .63 in the population then what is the frequency of the q allele?

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

How can antibodies "remember" a particular bacterial invader or "antigen" on that invader?