Cyanophyceae or Myxophyceae (Blue-green algae) These are unicellular, colonial or multicellular bodies. They are unicellular flagellates, found in stagnant water and in damp soil, in freshwater, seawater, and even in snow as "snow algae". Of the approximately 6000 species, most red algae are marine; only a few occur in freshwater. Blue-green algae contains different types of pigments such as chlorophyll-a, β-carotene, xanthophyll’s and phycobilins, c-phycoerythrin and c-phycocyanin. They do not have flagellated cells, are structurally complex, and have complex life cycles divided into three phases. These organisms often live symbiotically with aquatic and marine animals. Algae can be either unicellular or multicellular organisms; Algae lack a well-defined body, so, structures like roots, stems or leaves are absent; Algaes are found where there is adequate moisture. Their nucleus is prokaryotic. Algae. Algae - Algae - Classification of algae: The classification of algae into taxonomic groups is based upon the same rules that are used for the classification of land plants, but the organization of groups of algae above the order level has changed substantially since 1960. Rhodophytes are usually multicellular and grow attached to rocks or other algae, but there are some unicellular or colonial forms. Reproduction in algae occurs in both asexual and sexual forms. A few green algae are found in marine environments. They are said to have given rise to the terrestrial plants. As the name implies, an unicellular organism is that living being whose body consists of a single cell. In general algae can be referred to as plant-like organisms that are usually photosynthetic and aguatic, but do not have true roots, stems, leaves, vascular tissue and have simple reproductive structures. The chlorophyta is the commonly found green algae and is composed of almost 7,000 species. Two filaments of cytoplasm, flagella, extend from one end, and their whip-like lashings pull the Chlamydomonas through the water and rotate it at the same time. Of these, unicellular algae include dinoflagellates, chlorophyta or green algae and diatoms. Diatoms alone have over 100,000 species. They contain the chlorophyll a, b and the orange and the yellow pigments the carotenoids. These algae may be unicellular, multi cellular or colonial. Green Algae Green algae can be either unicellular or multicellular. The mitochondrial and chloroplast is double membraned. Chlamydomonas is a genus of green algae. Other eukaryotes include single-celled fungi … Asexual reproduction occurs by spore formation. https://www.biologycorner.com/bio1/notes_plantlikeprotists.html Also affectionately known as “Mermaid’s Wineglass” in reference to its unique shape, this unicellular organism is a type of green algae that boasts an unusually large nucleus. 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