in what animals is blastula
1 Whole mounts of whitefish blastula will illustrate reproductive cells in animals. 2  These undifferentiated cells undergo mitosis at a regular interval as the embryo increases in number of cells and complexity.3  You will make observational drawings and be prepared to take a practical quiz. Whole mounts of whitefish blastula will illustrate reproductive cells in animals. 2  These undifferentiated cells undergo mitosis at a regular interval as the embryo increases in number of cells and complexity.