The correct option is 1: Ca and Mg ions The high capacity of sponges for regeneration is one of their most remarkable biological features, demonstrating fundamental cell-to-cell recognition and adhesion mechanisms. The entire process of regeneration, particularly the ability for dissociated sponge cells to reaggregate and reconstruct a functional organism, is critically dependent on the presence of specific divalent cations, namely calcium (Ca2+) and magnesium (Mg2+) ions. These ions are…Read More