Occurrence. Characteristics of algae 1. They are chlorophyllous thus autotrophic, with simple thallus and lacks tissue differentiation. Algae a ubiquitous and diverse group ranges from unicellular to giant multicellular forms. Classifications. Some are unicellular eg. •The current systems of classification of algae are based on the following main criteria: o kinds of photosynthetic pigments, o type or chemical nature of photosynthetic energy storage products o photosynthetic membranes’ (thylakoids) organization and other features of the chloroplasts. Algae: Occurrence, types, classification, economic importance Topics covered: Introduction to algae. General Characteristics II. General Characteristics II. Ø Algae are present in all parts of the world including Arctic and Antarctic regions (universal occurrence) Ø Sex organs are unicellular or multicellular. Algae are eukaryotic organisms that have no roots, stems, or leaves but do have chlorophyll and other pigments for carrying out photosynthesis. I. They are unicellular or multicellular Eukaryotic organisms. The cell wall consists of two layers, or valves, that cover each other. Algae are eukaryotic thallophytes. Algae (singular: alga) are photosynthetic, eukaryotic organisms that do not develop multicellular sex organs. Algal cells have a double-membrane bound nucleus, mitochondria, vacuoles, chloroplastids, Golgi bodies, endoplasmic reticulum and 80S ribosomes. The characteristics of green algae? General Characteristics of Algae. Classes in Detail 2 Hierarchical system of classification: Level: suffix: example: Domain Eukaryote Group Plantae Division -phyta Chlorophyta Class -phyceae Ulvophyceae Order -ales Ulvales They are found in different habitats from fresh to marine waters to extreme conditions. Characteristics of Algae Presentation by Ali Akbar,Hassan Adrees,Rida Ayoub,Tanzila Ashraf Maria Nasrullah GC University Faisalabad Punjab,Pakistan 2. The genome structures within Chlorophyta are all different. General Characteristics of Protozoa Although they are often studied in zoology courses, they are considered part of the microbial world because they are unicellular and microscopic. They are usually aquatic. Chloroplast types V. Major Polysaccharide Reserves VI. General Characteristics of Algae. Some of the algae are also found as terrestrial, subterranean or epiphytic forms. Algae Algae And Their Characteristics, Types Of Algae, Ecological Relationships, Factors Limiting The Productivity Of Algae. The study of algae is known as phycology (phycos = seaweed). Reproduction and Life History Patterns Ill. Photosynthetic Pigments IV. May 10, 2017 Listed below are some of the general characteristics of algae. You answered correctly: False Many algae are unicellular, but others are … The chloroplasts shows various shape ie. GENERAL CHARACTERSTICS OF ALGAE. Algae are simple,Unicellular,non-jacked sex organ And have no embryo development. Oogonium (female sex organ) of Oedogonium *. Download PPT (Algae: General Characters), @. Did you know the answer: You said 'Think so'. General Characteristics of Algae . Bacillariophyta algae are unicellular or colony-shaped, spread patterns spread in freshwater and saltwater. Introduction to algae. 2. 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. Algae Introduction: The study of algae known as Phycology. Distinguishing Classes III. It is routinely used to indicate a polyphyletic (i.e., including organisms that do not share a common origin), noncohesive, and artificial assemblage of O2-evolving, photosynthetic organisms. Cellular Characteristics of Algae: Algae—being eukaryotic organisms—have a cellular organization like that of other photosynthetic eukaryotes. View Botany.pdf from ORGANIC CH 225 at Hunter College, CUNY. Classify algae into the different groups; red, green and brown algae showing the differences and similarities between the different members. In general algae can be referred to as plant-like organisms that are usually photosynthetic and aquatic, but do not have true roots, stems, leaves, vascular tissue and have simple reproductive structures. o the presence or absence of flagella (as well as the number and They are chlorophyllous thus autotrophic, with simple thallus and lacks tissue differentiation. Your email address will not be published. Describe the general characteristics of algae in terms of life cycle, distribu-tion and structure. General Characteristics II. What are algae? Sexual: isogamous or oogamous type gametic fusion. Ecology / Environmental Science / Diversity PPT, Please Share for your Students, Colleagues, Friends and Relatives…, Your email address will not be published. 1. Eukaryotic Algae General Characteristics ll. Algae are chlorophyll-bearing autotrophic thalloid plant body. Spiral shape in. 2. Reproduction and Life History Patterns III. In most groups of algae it appears that the plastid has been derived by at least two serial endosymbioses. Uses of algae - definition. Algae - based municipal wastewater treatment systems are mainly used for nutrient removal (removal of nitrogen and phosphorous). Download PDF for free. There are about 35000 species of algae.They include planktons, pond scums, stone worts, sea weeds, sea lettuce etc. They are found in wet and damp places. Photosynthetic Pigments IV. The term thallus is used for a plant body that is not differentiated into root stem and leaves and lacks vascular system. They are cosmopolitan in distribution. For examples, diatoms. Fungi – General characteristics • Mycology – myco, myce • Eukaryotic, aerobic • Heterotrophic – Complex nutritional requirements • Nutritional sources –Saprophytic • Decomposers – Opportunistic parasites •Host is usually compromised Algae are used as food as they are rich in carbohydrates, vitamins and few other inorganic substances. In the Plankton Unicellular Algae are found enormously. The LibreTexts libraries are Powered by MindTouch ® and are supported by the Department of Education Open Textbook Pilot Project, the UC Davis Office of the Provost, the UC Davis Library, the California State University Affordable Learning Solutions Program, and Merlot. CHLOROPHYCEAE: GREEN ALGAE. We also acknowledge previous National Science Foundation support under grant numbers 1246120, 1525057, and 1413739. Protozoa are notable for their ability to move independently, a characteristic found in the majority of species. (adsbygoogle = window.adsbygoogle || []).push({}); On the basis of photosynthetic pigments algae classified into three classes. BOTANY SYLLABUS UNIT-1 Algae-General characteristics, Classification, Organization of thallus, cell structure, Pigmentation, Reproduction, Phaeophyta Characteristics of Phaeophyta The members of this division are commonly called brown algae because of dominant carotene and fucoxanthin, The brown algae are widespread and with few exceptions all are marine. o cell wall composition and structure. Gaurab Karki (green algae) ~ 16,000 species ~ 90% freshwater I. Lecture Note in Algae General Characteristics, Ecology / Environmental Science / Diversity PPT, Bryophytes General Characters PPT (Mosses, Liverworts and Hornworts), Secretory Tissue in Plants PPT (Structure, Classification and Examples), Pteridospermales PPT (General Characteristics, Classification and Affinities). Botany, Class 11 Some are unicellular eg. Chloroplast types Major Polysaccharide Reserves VI . July 27, 2019 0 comments They may be • Terrestrial- growing on moist soil, walls and rocks, e.g., Fritschiella. Asexual: asexual spores (motile zoospores). 6- Algae General Overview DEFINITION The term algae has no formal taxonomic standing. Characteristics. They occur both in marine and fresh water habitats. Almost all the algae are aquatic. 3. There are many different species belonging to Chlorophyta; some are unicellular, some are multicelluar. Enter your e-mail address. They grow attached to the rocks, shells, or coarser algae such as the kelps. They are autotrophic. Thallus Construction and Growth III. General chartacters of Algae. Linnaeus in 1753 was first to introduced the term algae (Latin- seaweeds) meaning, the Hepaticeae. Learn more: Lecture Note in Algae General Characteristics. Algae play a major role in aerobic treatment of waste in the secondary treatment process. About 90% of the total species grow in fresh water habitats and 10% are marine. Economic importance. According to the records, there are more than 50,000’s known species of Algae and based on their habitat, presence of biological pigments and other characteristics they are classified into seven different types. Algae can be unicellular, or they may be large, multicellular organisms. The word algae represent a large group of different organisms from different phylogenetic groups, representing many taxonomic divisions. 0. Tiana Ramer SCORE Prepared Slides of Algae 100% Introduction to algae 100% Summarize the general characteristics of algae 100% All algae are unicellular. The thallus of algae shows great degree of variation in size and form. Algae are photosynthetic organisms; 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. Algae - definition. Its body lacks specialized structures like Roots, leaves, and Stems. Chlamydomonas; Pant body: known as Thallus and they are avascular; Habitat: Algae are usually aquatic, either freshwater or marine and some are terresterial. The algal cell wall is made up of cellulose. Morphology IV. They are unicellular as well as multicellular. Algae a ubiquitous and diverse group ranges from unicellular to giant multicellular forms. Role of ADH, Angiotensin and Aldosterone in Osmoregulation, Rotavirus-Classification, Structure composition and Properties, Replication, Mode of Transmission, Pathogenesis, Clinical symptoms, laboratory diagnosis, Treatment, Prevention and Control, Copyright © 2021 | WordPress Theme by MH Themes. Algae are photoautotrophs. Eukaryotic Algae I. Characteristics of Algae: 1. Some of them are used as food. The major groups of algae are therefore related to the type of protist host and the type of plastid, and these are described. Most species swim freely, but some stick to plants or other objects. Algae are the simplest multicellular plants. Some species shows Alternation of generations in their life cycle. Pheophyceae are called commonly known as brown algae. Algae can be used to treat both municipal and industrial wastewater. Based on their general features, algae are grouped into Kingdom Protista. Algae are the simplest multicellular plants. Algae can be multicellular or unicellular. Unicellular algae occur most frequently in water, especially in plankton. • Epiphytes- growing on other plants, e.g., Trenteopohlia, Protococcus, etc. Flagellated stages and Flagella types Main characteristics of Algae Algae are simple, chlorophyll bearing and photosynthetic non vascular plants whose body is a simple thallus without differentiation into roots, stems and leaves. Algae have simple, unicellular non-jacketed sex organs and have no embryo development. Algae Characteristics. A single endosymbiosis appears to have occurred in the green algae, the red algae and the glaucocystophytes. Ø Majority of algae are in aquatic habitat (fresh water or marine), some algae are terrestrial also. 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, Learn more: Lecture Note in Algae General Characteristics, You can DOWNLOAD the PPT by clicking on the download link below the preview…, Please be patient for few seconds to load the PPT preview…, This is an embedded Microsoft Office presentation, powered by Office Online. Storage form of food: Starch Chlorophyta is a division of green algae contain chlorophylls a and b, and store food as starch in their plastids. However, there are some common characteristics across species. General Characteristics and Classification of Algae biolearners. The general shape of the cell is rectangular until it is round but there are many variations. General Characteristics of Algae Dr. Tariq Aftab PhD (AMU), PostDoc (IPK, Germany) Thank you . 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