They are also known as Cynabacteria. In this article we will discuss about the Fritsch’s and Smith’s classification of algae. Practice. Few species have delicate hairs on the flagella. This phylum contains over 7000 recognized species. They are mostly unicellular flagellated algae. Learn vocabulary, terms, and more with flashcards, games, and other study tools. The flagellum does not contain tubular hairs. Do not have to swell at the flagellar base. In which a vast amount of Algal Blooms raised at the same time. Most algae are aquatic but some grow in semi-aquatic and terrestrial environments. General characteristics of algae, Classification of algae based on habitat, Thallus diversity in algae, Chloroplast shape variations in algae, Pigmentation in algae, Reproduction in algae, Life cycle in algae. The cell possesses two anteriorly directed flagella with tubular hairs on one or both flagella. kyanas, a dark blue substance; phyton, a plant) while other workers believed … Both algae and fungi form thallus. This class contains about 1000 known species. Classification of Chlorophyceae (Green Algae) Important characteristics: They are commonly found in fresh water bodies(e.g., Ulothrix) or on soil, but a few are marine (e.g., Ulva, Enteromorpha). 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A few algae inhabit benthic region, with both coccoid and colonial forms. They also contain phycocyanin carotenoids, xanthophyll, and phycobilins and phycoerythrin (phycobiliproteins) as accessory pigments. Most algae store carbohydrate as reserve food, few members contains alcohol, fat or oil as reserve food. Examples: Chlamydomonas, Spirogyra, and Chara. During the Asexual reproduction fragments of the Algal body are formed. The algae have great important because they produce much oxygen on the earth for animals and human beings. There is three main Algae classification: Chlorophyceae – These are called green algae, due to the presence of pigments chlorophyll a and b. Start studying Algae Classification and Characteristics - Lecture Exam 1. Examples: Gonyostomum, Vacuolaria, Merotricha, Chattonella, Chlorinimonas, Haramonas, Psammamonas,Fibrocapsa, Heterosigma, and Viridilobus, etc. The other two major classes are Chlorophyceae (green algae) and Rhodophyceae (red algae). chlorophyll a and b. They contain one or more yellow-green chloroplasts with pigments like chlorophyll a, violaxanthin and β-carotene. When they get a sympathetic environment spores will germinate. Cell wall consists of cellulose, hemicellulose, and calcium carbonate in some species. Examples: Stonewort (Chara), filamentous (Spirogyra) and desmids. amzn_assoc_marketplace = "amazon"; Cell wall composition. amzn_assoc_tracking_id = "mywebsit03240-20"; Algae Characteristics. The term algae mean Aquatic Plants but differ from the plants in lacking a well-organized vascular conducting system and in having very simple reproductive structures. During the Asexual reproduction crumbling of Algal colonial, or by spore development. The algae belong to the subphylum Thallophyta of the kingdom Protista in modern classification of organisms. Algal cells are primarily eukaryotic cells with membrane-bound photosynthetic (chloroplast), respiratory (mitochondria) and genetic organelles.. Photosynthetic forms contain chlorophyll a, and chlorophyll c with accessory pigments like peridinin or fucoxanthin. They possess many types of life cycles and their size range from microscopic Micromonas species to giant kelps. They contain two or more flagella which do not bear tubular hairs (mastigonemes). amzn_assoc_ad_mode = "search"; The cell is flattened shape with 10–50 μm in length. Listed below are some of the general characteristics of algae. For example, some phycologists place the classes Bacillariophyceae, Phaeophyceae, and Xanthophyceae in the division Chromophyta, whereas others place each class in separate divisions: Bacillariophyta, Phaeophyta, and Xanthophyta. Progress % Practice Now. 1. The study of algae is known as Phycology. Zygote never form embryo. Learn vocabulary, terms, and more with flashcards, games, and other study tools. The study of algae is known as phycology (phycos = seaweed). They inhabit in soil, freshwater and marine environments. They are either motile or non-motile. Algae Classification. Algae are living organisms which are distributed throughout the world. MEMORY METER. Sexual reproduction is unknown among the representatives of Pleurastrophyceae. They possess one to three flagella for locomotion. The cell wall is composed of pectic compounds. Ø The classification of algae by Fritsch is primarily based of the pigmentation in algae. Heterotrophic and mixotrophic algae types are found as other nutrition modes. Examples: Sea lettuce (Ulva), Acetabularia, Caulerpa, Monostroma, etc. Algae, singular alga, members of a group of predominantly aquatic photosynthetic organisms of the kingdom Protista.Algae have many types of life cycles, and they range in size from microscopic Micromonas species to giant kelps that reach 60 metres (200 feet) in length. 1. The cell is covered with periplast with often elaborately decorated sheet or scale. Phaeophyceae is divided into 9 orders by Fritsch. These are eukaryotic organisms, autotrophic in nature as have chlorophyll in their cells. They contain pigments like chlorophyll a, chlorophyll c, carotenoids and fucoxanthin. These types of algae belong to the class Phaeophyceae under the phylum Phaeophyta. The second phase is diploid which have two chromosomal sets. Pigmentation and Photosynthetic apparatus 2. amzn_assoc_title = "Shop Your Products"; Taxonomically Green Seaweed can be classified into two divisions:. 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