Which organelle is known as “power house” of the cell? 1.A-D). Of course, it is thought that all plants developed from cyanobacteria (aka blue green algae). The thallus is multicellular, Microalgae:These algae are small microscopic, maybe in form of single cell or group of cells, photosynthetic that requires a microscope for recognition. A golden brown pigment called fucoxanthin is present and it Thermophilic Algae - These live in hot springs. size. holdfast which attach thallus to the substratum. In Rhodophyceae rhodophycean or floridean starch and in Cyanophyceae myxophycean starches are the reserve foods. In the scientific classification established by Carl Linnaeus, each species has to be assigned to a genus (binary nomenclature), which in turn is a lower level of a hierarchy of ranks (family, suborder, order, subclass, class, division/phyla, kingdom and domain). proteins. Motile  Morphology of motile reproductive cells. Dominant in freshwater rivers, ponds, and lakes. spermatium. TOS4. Phaeophyceae – Also called as brown algae, they are predominantly marine. Class I – … Majority of the forms are found in marine habitats. The classification of algae has proved to be a complex process that has experienced several revisions over the years. There aretwo types of algaeare classified into two different categories 1. The storage product is floridean starch. The carotenoids are of two kinds: Carotenes and Xanthophyll’s. The salient features of Chlorophyceae, Phaeophyceae and Rhodophyceae are given below. Male sex organ is spermatangium which produces In Phaeophyceae flagella are two lateral, one acronematic and one pantonematic and unequal in size. In Phaeophyceae cell wall contains alginic acid and fucinic acid. Corallina­ and Lithothamnion are heavily impregnated with lime and form coral reefs. For example, sexual reproduction is completely absent in Cyanophyceae. Cell division by mitosis and meiosis is not found. the classification of the algae. In Xanthophyceae, Phaeophyceae and Bacillariophyceae there are 3 thylakoids per granum and pyrenoids are without starch plates. In Rhodophyceae, R-phycoerythrin is the chief pigment and in Cyanophyceae, C-phycocyanin is the chief pigment. Privacy Policy3. Besides, several other algae are found in somewhat drier conditions. Algae are usually green, but they can be found in a variety of different colours. Nuclear Organization 2. He classified algae­ into 11 classes namely … We classify algae mainly by their molecular composition, for example the pigments they use for photosynthesis and the compounds they use for cell walls. Cyanophyceae or blue green algae are prokaryotic in nature whereas all other classes of algae are eukaryotic. Macroalgae: These algae are large enough t… THIS SET IS OFTEN IN FOLDERS … Asexual reproduction takes place by means of monospores, neutral Epizoic Algae - These grow … Fritsch proposed a classification for algae­ based on pigmentation, types of ­flagella, ­reserve food materials, thallus­ structure and ­reproduction. The zygote He published his classification in the book “The structure and  reproduction  A golden brown pigment called fucoxanthin is present and it BSc 1st Year Botany Classification of Algae Sample Model Practice Question Answer Papers: BSc is a three-year program in most of the universities. Storage bodies called Meiosis occurs during carpospore formation. It reproduction is Oogamous. and Xanthophylls. In Xanthophyceae oil and leucosine are reserve food materials. Members of this group include ‘Red algae’ and are mostly marine. Sexual reproduction is present and may be isogamous, anisogamous or proposed a classification for algae­ based on pigmentation, types of He classified algae­ into 11 classes namely Compiled by a diverse team of experts, with experience in scientific and industrial fields, the Comprehensive Report for Wastewater Treatment Using Algae is the first report that provides in-depth analysis and insights on this important field. January 2015; DOI: 10.1007/978-94-017-7321-8_2. The thallus is filamentous (Ectocarpus) frond like (Dictyota)or may be giant kelps (Laminaria and Macrocystis). . Share Your Word File ­flagella, ­reserve food materials, thallus­, structure and ­reproduction. •The current systems of classification of algae are based on the following main criteria: okinds of photosynthetic pigments, otype or chemical nature of photosynthetic energy storage products ophotosynthetic membranes’ (thylakoids) organization and other features of the chloroplasts. In Chlorophyceae there are 2-6 thylakoids per granum and the pyrenoids are covered with starch plates. For instance, algae living in snow contain carotenoid pigments in addition to chlorophyll, hence giving the surrounding snow a distinctive red hue. The pigment is one of the most important criteria used in differentiation of classes in algae, as algae were initially and primarily separated on the basis of colour e.g., green algae, red algae, brown algae or blue-green algae. Classification of algae 1. Apical or sub-apical in position and acronematic type i.e., isokontic FOLDERS … the classification of algae was by... Sargassum, Laminaria, Fucus and Dictyota to help students to Share notes in Biology are... Set is OFTEN in FOLDERS … the classification of the algae exist in ranging... Like chloroplast, mitochondria, chloroplast and store starch in vegetative and reproductive structures Chlorophyceae Phaeophyceae. Mission is to provide an online platform to help students to Share in! 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