Golden alga feeding. Transmission electron micrograph (TEM) of a section through an Ochromonas sp. golden alga which is digesting a Chlorella pyrenoidosa green alga. The partially digested Chlorella (oval, lower centre) appears in the large food vacuole (white) of the Ochromonas cell. Another free-swimming Chlorella (dark oval) is at bottom left. The Ochromonas' nucleus (grainy) is at centre left with the stems of two flagellae at upper left. Magnification: x5800 at 4. 5x5 inch size.