Lichens are a symbiotic relationship between fungi and photosynthetic algae or cyanobacteria. Cyanobacteria are a phylum of photosynthetic bacteria. Modern photosynthesis in plants and most photosynthetic prokaryotes is oxygenic. A lichen is a symbiosis of a macroscopic fungus with photosynthetic microbial algae or cyanobacteria. DNA in chloroplasts codes for redox proteins such as photosynthetic reaction centers. Corals often form symbiosis with other organisms, particularly photosynthetic dinoflagellates. In trophic systems photosynthetic organisms are the primary producers. Fusulinids are the earliest lineage of foraminifera thought to have evolved symbiosis with photosynthetic organisms. So bioluminescence evolved parallel with photosynthetic organism. These carotenoids must be obtained from plants or other photosynthetic organisms. Phytoplankton account for about half of all photosynthetic activity on Earth. This replenishment occurs on Earth through photosynthetic organisms. She observed the motion of the carbon fixing organelles in photosynthetic bacteria. Several groups of animals have formed symbiotic relationships with photosynthetic algae. Daily cycles are also influenced by the activity of photosynthetic organisms.