The two substances needed in this situation are:
potato extract and catechol<span />
Solar power/energy or hydroelectric plants
Differentiation->Fertilization->Gamete Production-Mitosis
<span>Fertilization->Differentiation->Gamete Production->Mitosis </span>
<span>Gamete Production->Fertilization->Mitosis->Diff... </span>
<span>Mitosis->Fertilization->Gamete Production->Differentiation </span>