1. cells contain that holds the instructions for cell specialization within multicellular organisms. fill in the blank and there are no options.

The answer is nucleus. The nucleus contains DNA chromosomes that have genes responsible for coding for proteins. These proteins subsequently determine the phenotype of an organism . The genes in the cells are turned on or off in pluripotent cells such that the cell differentiates into a particular cell type e.g skin cell, liver cell or blood cell.

answer seismograph;