Yeasts are bacteria which have a type of cell division called budding. Hormogonia are produced by some cyanobacteria. Lichens are sensitive to air pollution, especially SO 2 . In Puccinia graminis , one host for the rust is the apple tree. Peziza is a fungus which produces an apothecium.
Ascospores are haploid.
Giardia is an intestinal parasite of humans and other animals which belongs to the same group as the malaria organism. Ulva and Polysiphonia both have alternation of generations types of life cycles. Spirogyra produces motile, flagellated gametes like most other green algae. Most brown algae are found in cold ocean water. Diatoms have silicon in their cell walls.