Consider the following statements about the number of nuclei in cells: I. A cell normally contains one nucleus. II. Vari
One nucleus per cell is the usual condition, but variations in nuclear number occur. Some specialised mature cells, including erythrocytes of many mammals and sieve-tube cells of vascular plants, lack a nucleus.
Ref: NCERT Class 11 Biology Chapter 8: Cell: The Unit of Life Cell Theory and Overview of Cell
