Figure 3: SEM image of spicules cultivated in vitro in primmorph of L. baikalensis during three months: (A) spicule cultivated in ABW in the presence of 70 silicate. The spicule is smooth with small spines and bubbles; (B) the spicule in NBW; (C) the spicule cultivated in ABW in the absence of silicate. Scale bars: 20