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1. Diatomin is … Read other notes on Classification of Plants for Class 11 Biology. Give a few examples. ii. c) Pyrenoids in the cell. Protozoa are eukaryotic, unicellular and heterotrophic protists. Cyanophyceae or Myxophyceae. Green. Class. #Algae #TypesOfAlgae #PlantKingdom Description of various forms of algae alongwith different types of spores present in them. Xanthophyceae (Yellow Green Algae): Class # 11. Algae are simple, thalloid, autotrophic, chlorophyll-bearing and aquatic (fresh water & marine) organisms. Rhodophyceae : Red Algae. List the classification of each below from Kingdom to Species. Euglenineae 9. ii. The presence or absence of pigments is the main basis of classification of algae. was last updated on 4th December 2020 Red algae are found in almost all the oceans, but they are most common in warm-temperate and tropical climates, where they may occur at greater depths than any other photosynthetic organisms. Sexual reproduction also occurs that involves the process of meiosis where genetic material from two different parent cells combines. The nucleus is incipient type and lacks membrane bound organelles. Q1. They fix nitrogen gas (which cannot be absorbed by plants) into ammonia (NH3), nitrites (NO2) or nitrates (NO3). Discuss history, general characteristics of algae (habitat, cell number, body, design, covering, vascular and mechanical tissue, nutrition and reproduction :isogamous, anisogamous and oogamous with examples) . CLASSIFICATION • Fritsch’s Classification of Algae: • F.E. Class Myxophyceae ( Cyanophyceae or blue green algae) The algae are characterized by the presence of very rudimentary nucleus and they do not have well organized chromatophores ( i.e. Most of the algae are multicellular and marine algae (seaweeds). iv. Q:-The transverse section of a plant material shows the following anatomical features, (a) the vascular bundles are conjoint, scattered and … Chlamydomonas.. o Colonial forms: E.g. Alga is the singular of algae with a changing size from microscopic unicellular micro-algae (Chlorella and Diatoms) to large massive kelps that are usually a length extending in meters (200 feet) and then there's brown alga. Euglena 4. Most forms multicellular (complex), pigment contents are chlorophyll a and d, α- and β-carotene and xanthophyll’s, phycobilins—r-phycoerythrin and r-phycocyanin, reserve food in the form of floridean starch, cell wall constitution polygalactose sulphate esters and cellulose, motile cells at any stage of the life history are unknown, sexual reproduction advanced oogamous type, mostly marine, a few are fresh water. Summary. Q:-What different criteria would you choose to classify people that you meet often?Q:-What is meant by double circulation? - They also occur in moist stones, soils and wood.- Some occur in association with fungi (lichen) and animals (e.g., on sloth bear).- The form and size of algae is highly variable.o Microscopic unicellular forms: E.g. He treated algae giving rank of division and divided it into 11 classes. Artificial system of classification used gross superficial morphological characters and were based mainly on vegetative characters or on the androecium structure. iii. Bacillariophyceae (= diatoms): These are yellow-green-brown or olive green in colour. d) Thalloid body. The members of this phylum consisting of the photosynthetic organisms commonly known as red algae. Cyanophyta . Class 1. Food storage products are mostly starch and sometimes fat frequently aggregates around the pyrenoids. We are Hiring They reproduce asexually by cell division. Classification of Fritsch was based on the following criteria Pigmentation Types of flagella Assimilatory products Thallus structure Method of reproduction Fritsch divided algae into the following 11 classes 1.Chlorophyceae 2. Let us learn about algae classification and features. Central Board of Secondary Education, Indian Contract Act, 1872 : Introduction – CA Foundation Business law, Reasoning Quiz Online For IBPS Clerk & PO , SBI , SSC : Part – 89. Photosynthetic pigments: They possesses chlorophyll a, chlorophyll b and small amount of β-carotenoids. NCERT Books. Vegetative reproduction occurs through fragmentation wherein each fragment … Based on the type of pigment and the type of stored food, algae are classified into these classes—Chlorophyceae, Phaeophyceae and Rhodophyceae. 2. He divided it into 11 classes. Chlorophyceae: Chlorophyll a and b are present in them and impart the green colour. 13. vi. i. iii. What are the general characters of bryophytes? Fritsch (1935) is considered to be the most accepted. Thus, they are among the large producers on the earth; especially in aquatic habitat. ALGAE. Some marine brown and red algae produce large amounts of hydrocolloids. Algae are photosynthetic organisms belonging to the kingdom Protista. Algae, Bryophyte, Pteridophyte, Gymnosperms and Angiosperms as proposed by R.H. Whittaker in 1969. While others are heterotrophic and can ingest the food. Sitemap iii. Chlorophyceae (green algae) Phaeophyceae (brown algae) Rhodophyceae (red algae). The test will consist of only objective type multiple choice questions requiring students to mouse-click their correct choice of the options against the related question number. What is its function? Demo Videos Download Free solutions of NCERT biology Class 11th from SaralStudy. Biological Classification Class 11 Biology Notes Chapter 2 Pdf free download was designed by expert teachers from the latest edition of NCERT books to get good marks in CBSE board exams. These characteristics include the photosynthetic pigments, nature of photosynthetic reserve materials, the composition of cell wall or absence of cell wall, cellular and thallus morphology and reproductive behaviour. The type of species and environmental conditions determine whether the colonies will form filaments, sheets or hollow balls. Answer. The photosynthetic pigments present in these are chlorophyll a and c. iv. Colour. Class 11 Biology Algae NCERT Biology Class 11 – What are Algae and its types? Recently Viewed Questions of Class 11th biology. b) Green and thick walled. d) Colourless and thick walled. Amoeba 2. Algae are classified on the following factors:(a) Major photosynthetic pigments present. Learn the concepts of Class 11 Biology Plant Kingdom with Videos and Stories. Dinophyceae 7. The cell walls of many chrysophytes are composed of cellulose with large quantities of silica. Class 2. Most diatoms exist in a singular form, but some join to form colonies. Most algae are microscopic, but some are very large, for example, some marine seaweed can exceed 50 m in length. Name the types of nitrogenous bases present in the RNA. Among them, 6,793 species are found in the Class Florideophyceae. Mostly unicellular, colonial and filamentous forms rare, principal pigments are chlorophyll a, P-carotene and xanthophyll’s, storage product fat, sexual reproduction rare, specialized resting cells known as cysts produced endogenously, flagellated forms have either one flagellum tinsel type or when two one tinsel and one whiplash type, cell wall consists of pectin and silica, fresh water and marine. Stored food - Mannitol and laminarin. Our understanding of the plant kingdom has changed over time. Phylum. (e) Habitat. The common algal partners are either green algae Chlorophyta or Cyanophyceae family of blue-green bacteria. The dinoflagellates are important plankton and are primary food sources in warmer oceans. While some other dinoflagellates are colourless predators on other protozoa, and some forms are parasitic also. What is a mushroom shaped gland? Classification of Algae Algae are divided into various classes based on pigmentation, stored food and flagellation. Common name- Brown algae. a) Algae. In the case of higher algae, reproduction occurs through spores. Common name - Red algae. For More Information Talk To Our Sales Executive. Porpyra, Laminaria and Sargassum. Pigments include chlorophyll a and c, β-carotene and xanthophyll’s, stored food in the form of laminarin (polysaccharide) and mannitol form of alcohol, cell wall constitution algin, fucoidin and cellulose, sexual reproduction ranges from isogamy to oogamy, motile cells only in swarmer’s, two unequal flagella attached laterally, one tinsel and the other whiplash type, most of the species are marine. Before sharing your knowledge on this site, please read the following pages: 1. They are typically yellowish or brownish and are found in fresh- and saltwater, in moist soil, and the moist surface of plants. NCERT Ebook for class 11 All Subjects; NCERT Ebook for class 10 All Subjects; NCERT Ebook for class 9 All Subjects; NCERT Ebook for class 8 All Subjects; ... What is the basis of classification of algae? We are in NEWS i.Class-Chlorophyceae (Green Algae) The members of Chlorophyceae are commonly called green algae. Cyanophyceae or Myxophyceae (Blue-Green Algae): The best answers are voted up and rise to the top. Algae are classified in the kingdom of Protista, which consists of a variety of unicellular and some simple multinuclear and multicellular eukaryotic organisms that have cells with a membrane-bound nucleus. Privacy Policy3. Economically, they are used as a crude oil source and also in a number of pharmaceutical industries contributing to the assistance of mankind. IBPS SO Notification 2019 Out for 1163+ Vacancies- Check Here, Reasoning Quiz Online For IBPS Clerk & PO , SBI , SSC : Part - 89. Algae reproduce through vegetative, asexual and sexual methods. i. Thallophyta–Algae Plant Kingdom of Class 11. 11. Simple unicellular, colonial or multicellular bodies lacking nuclear, mitochondrial and chloroplast double membranes, pigments not in organized bodies as in other cases, principal pigments are chlorophyll-a, β-carotene, xanthophyll’s and phycobilins, c-phycoerythrin and c-phycocyanin, reserve food in the form of cyanophycean or myxophycean starch, cell wall composed of pectin or cellulose, most forms are embedded in mucilaginous or gelatinous sheaths, no motile cell has been observed at any stage, reproduction of the bacterial type, ‘false’ branching and special types of cells called ‘heterocyst’ are characteristic features in many, most diverse in distribution, from pole to pole, almost everywhere, ubiquitous. c) Colourless and thin walled. Check these questions for self-analysis and prepare for the exam more effectively. iii. Dr. Poonam Jaiswal, Lecturer Botany, JDB Govt. What is the basis of classification of algae? They are distributed worldwide in the sea, in freshwater and in moist situations on land. iv. iv. Phaeophyceae are also called as ‘brown algae’. Plant kingdom is divided into Algae, Bryophytes, Pteridophytes, Gymnosperms, and Angiosperms. 12. He divided it into 11 classes. Fritsch (1935, 1945) in his book “The Structure and Reproduction of the Algae” proposed a system of classification of algae. This division of kingdom Protista consists of the photosynthetic organism usually known as green algae. Cyanobacteria are the algae, which have a prokaryotic cell structure typical to that of bacteria. Tag – Class 11 Biology, NCERT 11 biology, TYPES OF ALGAE, Your email address will not be published. i. ii. Volvox 6. TOS4. (c) Cell wall composition. CHLOROPHYCEAE. For more information, videos lectures NCERT class 11, study material class 11, sample papers for class 11, Biology for Class 11, register with Takshila Learning. But have you ever given a thought to the smaller versions of plants, even the microscopic ones? Unicellular, colonial or multicellular green plants, generally with simple structure, principal pigments are chlorophyll a and b, carotenes and xanthophyll’s as in higher plants, contained in plastids. Algae are eukaryotic organisms, they have a membrane-bound structure called chloroplasts, which has chlorophyll, and this helps in carrying out photosynthesis. There will be total 10 MCQ in this test. Share Your Word File When and where does reduction division take place in the life cycle of a liverwort, a moss, a fern, a … Biological Classification Class 11 Notes Biology Chapter 2. Class 1 - 3; Class 4 - 5; Class 6 - 10; Class 11 - 12; CBSE. v. Diatoms can occur in a more compact form as a soft, chalky, lightweight rock, called diatomite. They do not have true roots, stems, leaves, vascular tissues, as they possess simple reproductive structures. Simple unicellular or colonial motile organisms, pigments chlorophyll a and b, (β-carotenes, xanthophyll, reserve food a polysaccharide paramylon, related to starch, and fats, sexual reproduction not proved definitely, no cell wall, motility by flagella, usually one or sometimes more, tinsel type. v. Hence, cyanobacteria are producers of their own food from simple raw materials. Seaweeds belong to this group. Yeast: Origin, Reproduction, Life Cycle and Growth Requirements | Industrial Microbiology, How is Bread Made Step by Step? Blue-green alga belongs to the group:a. Plantae.b. Pigments Present. There are several brown carotenoid pigments as fucoxanthin (in their cell chloroplasts) present in these organisms which give them brown colour. Class II - Phaeophyceae. Multiple Choice Questions Single Correct Answer Type. b) Multicellular sex organs. i. CBSE Notes CBSE Notes Class 11 Biology NCERT Solutions Biology. GST As Applicable Extra*. Here we have given NCERT Exemplar Class 11 Biology Chapter 2 Biological Classification. Nitrogen-fixing cyanobacteria need only nitrogen and carbon dioxide to live. Fritsch in his book ‘Structure and Reproduction in Algae’. These organisms bear red or purple colour due to the presence of accessory pigments called phycobilin. Heterocyst in Anaebaena: a) Green and thin walled. The individual cells are prokaryotic in nature. v. Most of the coral forming algae, which secrete calcium carbonate and play a major role in building reefs, belong to this group. v. Reproduction in most dinoflagellates is asexual, through simple division of cells following the process of mitosis. BNAT; Classes. Algae and fungi (In Five Kingdom System, Fungi have their own Kingdom, Fungi) are considered together in thallophyta (having undifferentiated plant body), though there is basic difference in the mode of nutrition (i.e., autotrophic in algae and heterotrophic in fingi). Euglena 4. Cyanophyceae . Algae reproduce by both sexual and asexual ways involving various reproductive strategies. CLASSIFICATION • Fritsch’s Classification of Algae: • F.E. (d) Number of flagella and position of insertion. Most green algae … Class 11 Biology Plant Kingdom: Introduction : Introduction . Xanthophyceae - Green-yellow algae; e.g., Vaucheria. Class 3. Chlorophyceae are also called as ‘blue-green algae’. Tags: Class 11 , Biology , Plant Kingdom Asked by Kriti Kumari 2 Answers (a) Major photosynthetic pigments present (b) Form of stored food (c) Cell wall composition (d) no. Cryptophyta. Most Popular Biology MCQs. Unicellular flagellated forms, scantly represented group, principal pigment nature not definitely known, except the phycobilins, reserve food a form of starch, cell wall of cellulose, two unequal flagella, sexual reproduction rare and isogamous, fresh water and marine. The various species of green algae are either unicellular, multi-cellular, coenocytic (having more than one nucleus in a cell), or colonial. Spirogyra 7. When aquatic diatoms die, they accumulate at the bottom, and the shells do not decay, but they simply collect in the ooze and finally form the material known as diatomaceous earth. Artificial system of classification used gross superficial morphological characters and were based mainly on vegetative characters or on the androecium structure. NCERT Books. Chlorophyceae includes algae such as chlamydomonas, volvox and spirogyra, commonly called green algae. The algae have chlorophyll and thus, can manufacture their own food through the process of photosynthesis. Chlorophyceae are commonly called as green algae. Structurally the most complex algae, simple filaments to massive plant bodies. The exact nature of the chloroplasts is different among different types of algae. 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