Chapter 3, Problem 3RA

Nerve and skeletal muscle cells in the adult, which do not divide, remain in the

$\begin{array}{l}\text{a}{\text{. G}}_1\text{ phase}\text{. c}{\text{. G}}_{\text{2}}\text{ phase}\text{.}\hfill \\ \text{b}\text{. S phase}\text{. d}\text{. M phase}\text{.}\hfill \end{array}$