Figure 1. a and b are the main cell types found in the calli. a, Non-dividing cells with small nuclei (nm) and small meristematic (m) cells with densely stained cytoplasm, prominent nucleus and condensed chromatin (100X), b, large and long non-dividing cells (200X). c and d are normal mitosis found in the calli cells. c, prometaphase (500X), d, metaphase ()(1000X)