The term \"algae\" covers many different organisms capable of producing oxygen through photosynthesis (the process of harvesting light energy from the sun to generate carbohydrates). Diatoms and brown algae are examples of algae with secondary chloroplasts derived from an endosymbiotic red alga. ... • 4. The Rhodophyta are distributed worldwide (see, for example, the distribution of Plocamium,) but they grow best in waters Division-level classification, as with kingdom-level classification, is tenuous for algae. Algae are eukaryotic, which means they have a nucleus. Login; Register; Home (current) Notes & Question Bank. The chloroplasts in algae contain three algal pigments called chlorophylls, carotenoids, and phycobilins. What are the Main Characteristics of the Plant Kingdom Kingdom : Plantae of Plant Kingdom Division : Thallophyta (Algae) The plants in this divisions are commonly called algae. Algae, singular alga, members of a group of predominantly aquatic photosynthetic organisms of the kingdom Protista. widely used in science and food preparation. Bryophytes are the most primitive land plants. Similarities between Algae … The primary pigments of euglenophytes are chlorophylls a and b, while their secondary pigments are carotenoids and xanthophylls. This belief is strongly supported by the similarities of many characters in algae and bryophytes. Antarctica has two erect and one encrusting algae as far as They inhabit in both freshwater … (2).Â Â Â Â Â Plant body is not differentiated into root, stem and leaves in both groups • 8. very fast flowing streams. Algae are photosynthetic organisms Specific general characteristics of algae are common to plants as well as animals. Â Presence of motile flagellated antherozoids in both groups, (14). Even though bryophytes are well adapted for the land life they require the presence of water for the completion of their life cycle. The terms “Algae ” was coined by C. Linnaeus which means ‘sea weeds’. Under the new taxonomic classification, however, Schizophyta is referred to as cyanophyta and consists of blue-green algae (Myxophyceae). 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. Â In Chlorophyceae (algae) and Anthocerotales (bryophytes) the plastids contains pyrenoids, (12). (1).Â Â Â Â Â In both groups the plant body is thalloid and undifferentiated. There is three main Algae classification: Chlorophyceae – These are called green algae, due to the presence of pigments chlorophyll a and b. Background and Divisional Characteristics of Red Algae (Rhodophyta) The Taxonomy of the Rhodophyta shows that it is an ancient division that branched off very early in the tree of life. Most of the algae inhabit the aquatic environment, either freshwater or marine habitats. Unlike green algae or Chlorophyta, they lack true starch. This post describes the similarities and major difference between algae and bryophytes. thick, fleshy thalli (bodies). of red algae outweighs the total biomass of brown algae (phaeophyceae: Diatoms (diá-tom-os 'cut in half', from diá, 'through' or 'apart'; and the root of tém-n-ō, 'I cut'.) Euglena are fresh and salt water protists. Phaeophyta Characteristics Phaeophyta are the most complex forms of algae. This post describes the similarities and major difference between algae and bryophytes. Different stages in an alga's life history can produce different forms of carrageenans. The word algae represents a large group of different organisms from different phylogenetic groups, representing many taxonomic divisions. • 7. The other 98% are in the ocean. Euglenophyta. Ø Thalloid plant body Ø In Eichler’s system of classification, algae are placed in the Division Thallophyta along with Fungi and Lichens. put together (Goff, Lectures 1999). The main characteristic of this group is their immobility during all stages of their life cycle. The thallus of multicellular algae usually consists of a stipe, a holdfast, and blades. Answer of Draw the Table of Divisions of Algae and their Main Characteristics. (3).Â Â Â Â Â Gametophytic generation is the prominent phase in life cycle in both groups 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. Examples are Chlamydomonas, Spirogyra, and Chara; Phaeophyceae – Also called as brown algae, they are predominantly marine. Similarities between Algae and Bryophytes. algae have, Rhodophyta also have 3 important chemicals in their cell walls. Ø Algae are autotrophs (synthesize food using light energy) Most of euglenoids are autotrophic and photosynthetic. Photosynthetic pigments: They possesses chlorophyll a, chlorophyll b and small amount of β-carotenoids. Unicellular algae occur most frequently in water, especially in plankton. Many algae are Photoautotrophic in nature and make their own food by the process of Photosynthesis. kelps etc.) Both of these factors allow the Rhodophyta The food reserves contain sugar, higher alcohol and other complex forms of polysaccharides. Algae can be multicellular or unicellular. Primarily, algae are not highly differentiated i… There is only one class and two subclasses in the Division. Algae are photosynthetic microorganisms that perform photosynthesis and produce oxygen (O2) and consume carbon dioxide (CO2) from the atmosphere. Algae Classification. Morphological features of some representative types of algae are shown in Fig. The cell walls are composed of cellulose and alginic acid (a complex polysaccharide). Brown Algae: Phaeophyta. They are often termed as chlorophytes. Sexual reproduction may be isogamous, anisogamous or oogamous, Sex organs not covered with sterile jacket cells for production, Sex organs are always covered with sterile jacket cells for protection, Gametophytic and sporophytic generations are usually independent, Gametophytic and sporophytic generations are dependent and physically connected, Alternation of generation usually isomorphic, rarely heteromorphic, Alternation of generation always heteromorphic. Their plant body is a thallus. The Taxonomy of the Rhodophyta shows that Charophyta include (a) Spirogyra and (b) desmids. Â Both group can undergo vegetative reproduction by death and decay, fragmentation, and adventitious tubers, (13). This belief is strongly supported by the similarities of many characters in algae and bryophytes. Algae of the division Chlorophyta possess green chlorophyll pigments and … Fire algae (Pyrrophyta) Fire algae are unicellular organisms found in salt water environments with … Â Filamentous protonema in the juvenile stage of bryophytes resembles the algal plant body, (17). Brown algae, from the phylum Phaeophyta (meaning "dusky plants"), is … Give an example form each group green, yellow, brown, red, blue-green, classified for their color, method of reproduction, and form in which their food reserves are stored; volvox, diatom, giant kelp, sea grapes, cyanobacteria Sheets of agar gel are used in genetic research. are adept at energy storage. 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. These organisms are not necessarily closely related. There are very few single celled red algae. Enter your e-mail address. For more on Rhodophyta, visit UC Berkeley's ". particularly well adapted to low light levels, and the Antarctic species There is only one class and two subclasses in the Division. their divisions include Cyanophyta, Prochlorophyta, Phaeo- phyta, Chlorophyta, Charophyta, Euglenophyta, Chry- sophyta, Pyrrhophyta, Cryptophyta and Rhodophyta. They can be either unicellular or multicellular. Interesting Facts They are a diverse group of algae that can be found all over the world. They can also occupy on rocks, soils, vegetation, or moist […] much more extreme, and algae are often restricted to cracks and crevices. The algae comprise of a large heterogeneous assemblage of plants which are diverse in habitat, size, organisation, physiology, biochemistry, and reproduction. And secondly, the gametes (. Â Flagella of antherozoids are whiplash type in both groups, (15). Firstly, there are very few single celled This helps ensure that an entire algal population is not eaten up - at Photoautotrophic algae produce oxygen. Their plastids contain two membranes, chlorophyll, al well as accessories pigments of carotenoids and phycobiliproteins. Hard encrusting algae (calcified) are also very common in the tropics where The division is characterized by the following : The division comprises of most primitive […] What are the major groups of algae and what is the basis for their classification? Most of the evolutionary biologists believe that bryophytes were originated from Algae. Cryptophyta. • 6. to survive Antarctica's long months of near darkness. Besides having the usual cellulose cell walls that most it is an ancient division that branched off very early in the tree of life. Algae. Based on their general features, algae are grouped into Kingdom Protista. Many filamentous forms, however, have evolved in such a way as to create Listed below are some of the general characteristics of algae. Most of the evolutionary biologists believe that bryophytes were originated from Algae. The main difference between algae and bryophytes is the division of the plant body; no division of labour is observed in the plant body of algae whereas the plant body of bryophytes internally divides into photosynthetic and storage zones. Characteristics Of Algae • 3. In these subclasses, however, are over 10,000 species that have been described. Division Chlorophyta. In these subclasses, There is none. which is famous for the enormous brown algae, the total biomass (dry weight) Algae often protect themselves from grazers (like snails) by producing However, certain features unite them, while distinguishing them from the other major group of photosynthetic organisms: the land plants. 78 ºS of the equator. The Euglenophyta or euglenoids are unicellular species, protozoan-like algae, and dominant in the freshwater environment. different carrageenans that are indigestible to the herbivore. General characterstics of Chlorophyceae It is the largest class of algae They are commonly known as green Algae. of these species are found in fresh water, and those are only found in Green algae. Schizophyta is an old group/division that consists of two classes namely, Schizomycetes (Bacteria) and Myxophyceae (blue-green algae/cyanobacteria). 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. Â Water is essential for fertilization in both groups, (16). Produce oxygen ( O2 ) and Myxophyceae ( blue-green algae/cyanobacteria ) environments with … brown algae, lack... 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