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Macintosh Picture Format  |  1996-09-10  |  174.7 KB  |  640x310  |  8-bit (218 colors)
   ocr: Protozoa a protozoan known asActissa princeps, a member of the group known as radiolarians. Actissa prenceps is found at or near the surface of the ocean. At its center is a pink sphere, the central capsule, which is covered with pearllike nodules. This is surrounded by a solid yellow structure. The blue spikes that radiate from the center of the protozoan hold tiny endosymbiotic algae. So positioned, the algae are able to capture energy from sunlight for photosynthesis, and, in turn, to provide food for the host radi- 45