Oogonia, the female reproductive structures (below, in section), are bore on short stalks and after meiosis to form 8 nuclei (one meiosis and one mitosis) the oogonium then cleaves to form 8 large, non-motile eggs. Algae are both eukaryotic and prokaryotic organisms that have no roots, stems or leaves but do have chloroplast and other pigments for carrying out photosynthesis. Eukaryotic cells are those that have a true nucleus. 2. They mostly include bacteria and archaea. (F) Cyanobacteria (Blue-Green Algae) are prokaryotes and like all other prokaryotes, cyanobacteria lack a membrane-bound nucleus. The nucleus is pretty important and it has its own membrane that surrounds it. 6 terms. atomic number: The number of protons in an atomic nucleus, which determines the type of atom and how it … Cell - Structure and Functions living examples of blue-green algae . The Archaeplastids include the green algae (Chlorophyta), the red algae (Rhodophyta), another group of green algae (Charophyta), and the land plants.The Charaphyta are the most similar to land plants because they share a mechanism of cell division and an important biochemical pathway, among other traits that the other groups do not have. Search. The real distinguishing feature of the diatoms is their shells. The Prokaryotes -- those having no nucleus (Kingdom Bacteria: the traditional bacteria and blue-green algae), and 2. the Eukaryotes, those which have a nucleus. In this group of aquatic "plants" there are several types of growth: through the apex or cell division. Eukaryotes (/ j uː ˈ k ær i oʊ t s,-ə t s /) are organisms whose cells have a nucleus enclosed within a nuclear envelope. b) What does "arc view the full answer Their nucleus has no outer membrane and the cell is called prokaryotic. The term thallus is used for plants and algae with very simple, nonvascular structure. Viruses 1. Blue green algae are prokaryotic cells as they do not have membrane bound organelles and nucleus. Algae are eukaryotic (typically multi-cellular, but can also be single-celled) organisms that contain a nucleus, mitochondria, and chloroplasts within each cell. The Eukaryotes are therefore all living creatures except the bacteria and blue-green algae. The radial array transports the nucleus from the peripheral cytoplasm and positions it in a central location within the cell prior to division. All true algae have a nucleus within a membrane and chloroplasts inside one or more membranes. Only the cells of advanced organisms, known as eukaryotes, have a nucleus. Monera (or sometimes referred to as bacteria) are microscopic. Cells with mitochondria contrast with prokaryotes, which lack set, membrane-bound organelles, such as mitochondria. Thus, not every plant or animal cell has a nucleus at maturity. Most cells only have one nucleus, mainly because you really only need one “brain” and it could get confusing with conflicting instructions. BACKGROUND INFORMATION: Monera are single-celled organisms that do not possess a true nucleus. The term algae is now used for eukaryotic organisms. The answer is a qualified yes. (ii) They have a well organised nucleus. a) Cyanobacteria have a true membrane-bound nucleus. Mark the correct choice as: (a) Assertion is correct, Reasoning is correct (b) Assertion is correct, Reasoning is incorrect (c) Assertion is incorrect, Reasoning is correct (d) Assertion and Reasoning are incorrect They do not have nuclear membrane. The disadvantage of their simple composition is compensated to a certain extent by their increased adaptability. The cell of eukaryotic organisms (animals, plants, fungi) differs from that of prokaryotic organisms (Archaea and Bacteria) by the presence of several specialized organelles, such as: the nucleus (containing the genetic information of the cell), the mitochondria (site of cellular respiration), or the chloroplast (site of photosynthesis in plants). Their structure lack nucleus and customarily have no organelles. Olivia_Robertson28. Reason (R) : They do not have a true nucleus. When did organ music become associated with baseball? Green algae occur in a variety of forms. Learn vocabulary, terms, and more with flashcards, games, and other study tools. The chloroplasts are of many shapes, characteristic of the genus (Fig. They possess no nucleus and usually do without most of the other cell organelles. The Culture Collection of Algae and Protozoa (CCAP) is the largest collection of marine and freshwater algae, protists and seaweed in Europe. However, cells can lose their nuclei secondarily. i) Fungi ii) Bacteria iii) Algae iv) Protists The basic structure or design of the cell can be treated as one of the basic distinction among living organisms. They comprise the remaining four Kingdoms: Protoctista, Fungi, Plants and Animals. And Inspiral gyro. Organelles such as the nucleus, mitochondria, and prominent plastids (chromatophores) are typical of most diatoms. Nuclei from cells in other stages of the cell cycle do not have this capacity. The actual protoplast of a diatom is quite similar to that of other algae. These cells do not have membrane-bound organelles. The green algae have cells with a distinct nucleus and produce starch and one or more plastered containing chlorophyll the nucleus is evident. Organisms whose cells do not have a nucleus … Cyanobacteria or blue green algae have following characters which shows that they do not have eukaryotic organiation: 1. 5.32). The cell may or may not have a nucleus as in case of bacteria that does not have nucleus in its cell. The life cycle of brown algae. Each cell of the algae has a nucleus, chloroplasts (in the form of disks), a nutrient (a polysaccharide). As you can see, to the left, eukaryotic cells are … 3. But “prokaryotes” is a confusing term, as it means “before nucleus”. The antheridiophores have terminal inflated antheridia on their branches; these undergo meiosis and form 64-128 biflagellate male gametes (antherozoids). That would include plant, animal, algae, and fungal cells. 1. Blue green algae are prokaryotes and do not contain a true nucleus. do NOT have a nucleus. By the modern definition, all algae are eukaryotes, which means that the DNA in their cells is contained within a nucleus enclosed by a membrane. The valves are … The mitochondrion, an organelle that helps produce energy for the cell, is only found in eukaryotes, organisms with relatively large, complex cells. atomic: Having to do with atoms, the smallest possible unit that makes up a chemical element. Yes. Assertion (A) : Blue green algae are prokaryotes. Algae is a eukaryotic organism. Now notice what the liverwort does not have: leaves, stems, roots, or specialized vascular tissue. They behave as MTOCs. (i) They do not have a nuclear membrane. The basic structure of chloroplast consists of a series of flattened membranous vesicle called thylakoids or disc and a surrounding matrix. it is a plant cell so it has to have a nucleus. Most of the green algae have a single nucleus per cell, except the coenocytic siphonaceous ones which have many nuclei. Many cells don't have one. Microscopic invertebrate, Protozoa. NOT made of cells- Do not have cell membranes, cytoplasm or nucleus. 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