Cyanobacteria produce a range of toxins known as cyanotoxins that can pose a danger to humans and animals. The cyanobacteria Synechocystis and Cyanothece are important model organisms with potential applications in biotechnology for bioethanol production, food colorings, as a source of human and animal food, dietary supplements and raw materials.
Chapter 2: Biological Classification. Important Questions for Class 11 Biology- Biological Classification. Biological classification is the process of grouping living organisms. The five kingdom classification was proposed by R.H.Whittaker. He named the kingdoms as Monera, Protista, Fungi, Plantae and Animalia. He classified them on the basis of cell structure, thallus organization.
Euglena is a large genus of unicellular protists: they have both plant and animal characteristics. All live in water, and move by means of a flagellum.This is an animal characteristic. Most have chloroplasts, which are characteristic of algae and plants. Euglenids are believed to descend from an ancestor that took up green algae by secondary endosymbiosis.
Bacteria are unicellular and ultra-microscopic organisms, yet they play an important role in nature. They are of tremendous importance to man. They play an important role in agriculture and medicine and are the basis of many industries. Some are beneficial to man directly or indirectly, others are very harmful as they cause various plant and animal diseases.
Disclaimer: The Animal Diversity Web is an educational resource written largely by and for college students.ADW doesn't cover all species in the world, nor does it include all the latest scientific information about organisms we describe. Though we edit our accounts for accuracy, we cannot guarantee all information in those accounts.
Cyanobacteria. Cyanobacteria are a morphologically diverse group of photosynthetic prokaryotic microorganisms that form a closely related phylogenetic lineage of eubacteria. Historically, cyanobacteria were classified with plants and called blue-green algae, although true algae are eukaryotic.Cyanobacteria appear early in the fossil record with some examples approximately 3.5 billion years old.
Images of Nostoc and Oscillatoria provided by the University of Wisconsin Botanical Images Collection. For more information about cyanobacteria on the web, visit Cyanosite, a webserver dedicated to cyanobacterial research. Information about the ecology of fresh-water cyanobacteria is available from the Soil and Water Conservation Society of Metro Halifax.
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Biofertilizers are the substance that contains microorganism’s living or latent cells. Biofertilizers increase the nutrients of host plants when applied to their seeds, plant surface or soil by colonizing the rhizosphere of the plant. Biofertilizers are more cost-effective as compared to chemical fertilizers.
Interestingly, the Nostoc sp. HK-1 (which establishes a symbiosis with Cycas plants), which is a drought-tolerant species of Nostoc that has been suggested to be a contender that can survive in extraterrestrial environments, such as on Mars. However, in the absence of lab-based evidence, the possibility of the role of NO in cellular signaling and in the dialogue between plants and microbes.