Which of these body systems has cells that attach to each other to form a leak-proof barrier?

Epithelial cells are tightly packed, and this lets them act as barriers to the movement of fluids and potentially harmful microbes. Often, the cells are joined by specialized junctions that hold them tightly together to reduce leaks.

this protocol provides a detailed procedure for chromatin immunoprecipitation (chip) to study the dna-protein interactions.

ask your friends for what they got then copy it down if you don't have any friends which is fine than google it or pay the teacher