1. The flavobacterium is still a heterotroph as it needs reduced carbon compounds to live and cannot subsist on only light and CO2.

2. Moreover, the effects of different heterotroph-Cyanobacterium ratio (1:1, 1:10 and 1:100) on the growth of Cyanobacterium on BG 11 agar medium were studied (Fig

3. Cherts often have an “indirect” biogenic origin as they result from re-precipitation of dissolved opal-A shells derived from microorganisms such as diatoms (diatomite , diatomaceous Cherts, see also entry “ Diatoms ”) and radiolarians (radiolarite , see also entry “ Protozoa (Heterotroph, Eukaryotic) ”).