Figure 1. Partially bleached coral Oculina patagonica. (Photograph: Fine and Loya, 1994, provided by Eugene Rosenberg, Tel Aviv, Israel.)

Figure 2. Human mitochondrial DNA. Indicated are: gene encoding 16S-rRNA, the hypervariable region, the transfer-RNA genes (yellow) and the genes for ATP synthase. (Diagram: Anne Kemmling, Goettingen, Germany.)