Source(s): Currently a Biology Student. The prokaryotic cells consist of bacteria, blue-green algae, mycoplasma and PPLO (Pleuro Pneumonia Like Organisms). Generally, Humans, Animals, and plants are considered in this category as eukaryotic organisms. Theseresults argue in favor ofanendosymbiontorigin of thechloroplast. It is believed that 1ml of the water we drink contains close to 80,000 bacteria. They have a variety of internal membrane-bound structures, called organelles, and a cytoskeleton composed of microtubules, microfilaments, and intermediate filaments, which play an important role in defining the cell's organization and shape. According to the morphological point of view, prokaryotic cells are the most primitive cells. Kingdom Protista. These organisms can be either autotrophic or heterotrophic. The structure of a eukaryote (a typical plant cell) is shown in Figure 10.2a. As mentioned above, algae are eukaryotic organisms. Prokaryotic cells differ from eukaryotic cells in that they lack a membrane- bound nucleus and organelles. Monerans include bacteria and cyanobacteria (once known as blue-green algae). The eukaryotic cell is a chimera Figure 1. The kingdom Protista contains eukaryotes that cannot be assigned with certainty to other kingdoms . Prokaryotes live in many environments including extreme habitats such as hydrothermal vents, hot springs, swamps, wetlands, and the guts of animals. Desiccation tolerance must have evolved at least two times independently, first, in the prokaryotic algae (=cyanobacteria, Chap. Cell division by mitosis and meiosis is not found. They do not have membrane-bound organelles and true organelles while green algae is a eukaryotic organism which has a true nucleus and membrane-bound organelles. Cyanobacteria can photosynthesize which means they have the ability to produce their own food by using sunlight. 1. seaweeds-prokaryotic or eukaryotic? Eukaryotic; they have a nucleus with a nuclear membrane, a golgi apparatus and an endoplasmic reticulum . Following a conception of subdivision of living organisms into five kingdoms (Monera, Protoctista, Fungi, Animalia, and Plantae), the prokaryotic algae (blue-green algae, Cyanobacteria, Cyanoprokaryota) are placed in the Monera (Eubacteria) and the eukaryotic algae in the Protoctista. 2. Mostly fresh waters. Cyanobacteria or blue-green algae does not have chloroplast in their cells while green algae do have chloroplast in their cells because they are eukaryotic organisms. 1). Though they have genetic material, it’s not enclosed in a nucleus. What is the habitat that phylum chlorophyta live in? In prokaryotes, asexual division occurs basically binary fission. Moreover, the photosynthetic pigments are arranged into chloroplasts. Ultrastructure of Eukaryotic Algal Cell: Chlamydomonas, a member of green algae (chlorophyceae) is found almost in all places. thallus. a. 0 5. Evidence suggests that various intracellular eukaryotic organelles evolved from endosymbiotic prokaryotes (1). tantly to blue-green algae and perhaps to Bacillaceae. In eukaryotic algae, sexual reproduction occurs through the union of gametes. The kingdom Protista is an artificial grouping and classification does not represent evolutionary relationships. To answer this question, there is some background you need to know first. A single cell may contain one or more chloroplasts. Bacteria and blue-green algae are both primitive prokaryotes that live on earth now, as well as long time ago. Hence, they are also called as blue green algae. In prokaryotic cell, it is concentrated in nucleoid region. Eukaryotic: As a constrast, organisms other than bacteria possessing a well-defined nucleus are eukaryotes (eu = true; karyon = nucleus).There are other differences between prokaryotes and eukaryotes which are given below in Table. This basically means that their cells don’t have organelles (tiny structures inside cells that carry out specific functions) and do not have distinct nuclei—their genetic material mixes in with the rest of the cell. Prokaryote Life: Cyanobacteria A Quick Biology Lesson. Click to see full answer Thereof, is the cheek cell a eukaryote or prokaryote? 1, 2): Cell Wall of Eukaryotic Algal Cell: The cell is bounded by a thin, cellulose cell wall. … Blue-green cyanobacteria or algae are a type of microalgae that do not belong to eukaryotic algae. 3). Cyanobacteria as compared to green algae are potentially dangerous to the ecological environment of the aquatic organisms. 2. complex, but not as complex as terrestrial (land) plants. Diagram of the structure of a eukaryotic animal cell. Cyanophyceae or blue green algae are prokaryotic in nature whereas all other classes of algae are eukaryotic. This article specifically refers to the features of bacteria. Floaters in the plankton of rivers, lakes, reservoirs, and creeks. Both of them contains DNA molecules, they just differ in location. Cyanobacteria are also known as blue-green algae. 1 decade ago. Bacteria have a cell membrane and a cell wall. These are prokaryotic cells without well-defined nucleus or cell organelles. It means that genetic material is not bounded by a proper membrane; They are smaller in size. Prokaryotic Cells. The term "blue-green algae" was coined long ago before we had the ability to microscopically distinguish between prokaryotes & eukaryotes. Are phylum chlorophyta prokaryotic or eukaryotic organisms & why? Asexual reproduction of algae includes the production of mobile spores and division by mitosis. Hence, the algae do not belong to the kingdom of Plantae. Therefore, these algae possess primary plastid, that is, derived directly from the prokaryotic ancestor. But, we now know they are actually a type of bacteria, and thus, prokaryotes. cyanobacteria: photosynthetic prokaryotic microorganisms, of phylum Cyanobacteria, once known as blue-green algae; aerobic: living or occurring only in the presence of oxygen; endomembrane: all the membraneous components inside a eukaryotic cell, including the nuclear envelope, endoplastic reticulum, and Golgi apparatus; Origins of Eukaryotes. Prokaryotic cell includes archaea, blue-green algae and bacteria while Eukaryotic cell includes animals, plants, fungi and protists. Get your answers by asking now. Their size vary from 0.1µm to 5.0µm. Organism Cyanobacteria are prokaryotic organisms where as green algae are eukaryotic organisms. Prokaryotic cell- Bacteria - example The bacteria are microscopic unicellular prokaryotes. In prokaryotic e.g., Cyanophyceae—nucleus is not organized as nuclear membrane is absent. Cyanobacteria form the origin of plastids (for reviews see McFadden, 2001; Keeling, 2004; Palmer, 2003). Only bacteria and cyanobacteria (also called blue-green algae) have prokaryotic cells. lack true leaves, stems, and roots. 1. The prokaryotes are organised in the ‘three domain system’ and include bacteria and blue-green algae. The chromatin bodies remain scattered inside the cytoplasm. bactarial cell (Prokaryotic) blue green algae (Eukaryotic) muscle cell (Eukaryotic) blood cell (Eukaryotic) amoeba (Eukaryotic) virus (Prokaryotic) Hope that helps! An early filamentous prokaryote (Campbell, 1992) Stromatolites are formed by unicellular organisms called Cyanobacteria (formally known as blue-green algae).. Some do not consider the prokaryotes as true algae because they have a different structure, but most include these in the family of algae. Thus, photosynthesis has developed in a wide variety of organisms: red and green algae, green plants through primary endosymbiosis, brown algae and many other organisms through secondary or tertiary endosymbiosis. Green algae can be unicellular, multicellular or living in colonies. It is the process that synthesizes carbohydrates (foods) by capturing energy from sunlight. Blue-Green algae. Anonymous. They do not have a definite nucleus which includes bacteria and cyanobacteria (blue-green algae). Eukaryotic cells are present in all living organisms (both unicellular and multicellular organisms) except bacteria and blue green algae. Blue green algae are prokaryotic cells as they do not have membrane bound organelles and nucleus. However, in chloroplast, only prokaryotic type genes are working properly, since chloroplast is organellum derived from ancient cyanobacteria (blue-green algae). what is the structure of a seaweed. Cyanobacteria is a prokaryotic algae, while red algae (rhodophyta), green algae (chlorophyta), & brown algae (chromophyta) are eukaryotic These are unicellular, eukaryotic organisms with a well-defined nucleus enclosed in a nuclear membrane. They are ubiquitous (present everywhere) in nature. 2) and, second, in the newly evolved eukaryotic algal lineages originating from either primary (green and red algae) or secondary endosymbiosis (brown algae). Figure 10.2b shows the cell structure of a prokaryote, a bacterium, one of two groups of the prokaryotic life. The huge diversity of life species was posible due to the cell’s adaptation. Its ultrastructure can be divided into following parts (Fig. yes. The genetic material of green algae occurs in the nucleus. The slopes and elevations of the lines found for green algae (b = −0.219, a = −0.103, Fig. This is a diagram of a prokaryote cell and it shows that they are not very complex cells. Three major eukaryotic photosynthetic groups have descended from a common prokaryotic ancestor, through an endosymbiotic event. Cyanobacteria, and bacteria in general, are prokaryotic life forms. are seaweeds complex? Because the cyanobacteria (the blue-green algae) have very large cells and a green color, they were assumed to be algae. They have a well organized nucleus enclosed within nuclear membrane. DNA fibrils are free in nucleoplasm and are not associated with histones. In Prokaryotic cells true nucleus is absent. They do not have nuclear membrane. Eukaryotic algae are sexually dimorphic; Therefore, male and female gametes are produced by different individuals. All types of blue green algae and bacteria are included in this kingdom. Chloroplasts of red algae especially resemble cyanobacteria. is there a large range of seaweeds. Ask … Several clades exist that still have some extant members whose plastids have numerous prokaryotic characters. Prokaryotic cells are unicellular cells. PROKARYOTIC CELLS. Differentiate the prokaryotic cell from eukaryotic cell. Eukaryotic cells are typically much larger than those of prokaryotes, having a volume of around 10,000 times greater than the prokaryotic cell. Anonymous. It is simple, motile, unicellular, fresh water alga. 1 5. Many authors even include the prokaryotic cyanobacteria into the algae, because they exhibit a life-style rather similar to their eukaryotic counterparts and often share the same habitat with eukaryotic algae. do they have a nucleus? 1 decade ago. Since algae are eukaryotic organisms, they contain membrane-bound organelles in their cells. For chloroplasts, similarities with prokaryotes are found for photosynthetic membranes (2, 3), ribosomes (4), and path-ways of CO2 fixation and … 1, Table I) and for cyanobacteria (b = −0.202, a = −0.127, Fig. Although commonly referred to as blue-green algae, cyanobacteria are not actually algae. 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