Algal bloom commonly refers to rapid growth of microscopic, unicellular algae, not macroscopic algae. The algal population consists of turf algae, coralline algae and macro algae. Lichens are a symbiotic relationship between fungi and photosynthetic algae or cyanobacteria. A lichen is a symbiosis of a macroscopic fungus with photosynthetic microbial algae or cyanobacteria. In plants, algae and cyanobacteria, photosynthesis releases oxygen. In plants, algae, and cyanobacteria, photosynthesis releases oxygen. Paleobotany studies fossil plants, algae, and fungi. Not all blue-green algae cyanobacteria produce geosmin. Algae and corals in coral reefs produce organic material. The fungi benefit from the carbohydrates produced by the algae or cyanobacteria via photosynthesis. Hormones occur in multicellular organisms (plants, animals, fungi, brown algae, and red algae). "Paramecia" feed on microorganisms like bacteria, algae, and yeasts. It is located in the thylakoid membrane of plants, algae, and cyanobacteria. Carbonates and calcium are essential for all growth of corals, coralline algae, clams, and invertebrates. The biofuel blend included components derived from algae and jatropha plants.