Economic importance of algae class 11

Phycocolloids A number of phycocolloids are extracted for commercial use. These include agar, carrageenin and funori. Agar is used in solidifying laboratory culture media and is added as stabilizer or thickener in the preparation of jellies, puddings, creams, cheese, bakery, etc. Agar is obtained from Gelidium and Gracilaria. Carrageenin is used as a clearing agent in liquors, etc. It is extracted from Chondrus. Funori is a glue used as adhesive and in sizing textiles, papers, etc. It is got from Gloiopeltis. Food A number of red algae are edible, e.g., Porphyra (Laver). Porphyra is cultivated in Japan for commercial exploitation. Medicines Corallina has vermifuge properties while Polysiphonia is antibacterial. Carrageenin hastens blood coagulation. Phaeophyceae : Brown Algae Brown algae comprise about 2,000 species. Most of the brown algae are marine, except three-Pleurocladia, Heribaudiella and Bodanellia, which are found in fresh water. Unicellular forms are absent. The body consists of a branched filamentous structure in lower forms (e.g., Ectocarpus) and parenchymatous structure in higher forms (e.g., Sargassum, Laminaria, Fucus and Macrocystis). Brown algae include the largest algae. The giant brown algae are called kelps. The largest kelps are Macrocystis (40-60 m), Nereocystis (20-30 m) and Laminaria (2-9m). The plant body is often differentiated into holdfast, stipe and lamina. The algae are commonly found attached by means of their holdfasts. A few species of Sar...

What is economic importance of algae Class 11? Algae have diverse economic uses. They perform half of the total carbon dioxide-fixation on earth by photosynthesis, acting as the primary producers in aquatic habitats. (a) Food source: Many species of marine algae such as Porphyra, Sargassum, and Laminaria are edible. Chlorella and Spirulinaare rich in proteins. What is the economic importance of blue green algae? Blue green algae (BGA) possess immense morphological and metabolic diversity and can be used in economic development and environment management like wastewater treatment, land reclamation, production of fine chemicals, atmospheric fixation of nitrogen, production of methane fuel, conversion of solar energy, therapeutic … What are the economic importance of algae and gymnosperms? Hint: Algae and gymnosperms are used for several commercial purposes. Both of these are used as a food source. In addition, algae are used as an emulsifier in several products and other things whereas gymnosperms are used as a primary source of wood for construction purposes and other activities. What is importance of algae? Algae are the most important photosynthesizing organisms on Earth. They capture more of the sun’s energy and produce more oxygen than all plants combined. They form the foundation of most aquatic food webs, which support an abundance of animals. What are the three importance of algae? Algae are economically important in a variety of ways. The natural substance can be us...

Algae are aquatic organisms that are often mistaken for plants. They lack certain key plant structures, such as true roots, stems, leaves, and specialized reproductive structures. Algae are simple in structure, but they are important in the ecosystem for their role in photosynthesis and as a food source for other organisms. Algae lack certain structures that are found in land plants, such as leaves, roots, and other organs. Algae are distinguished from land plants by these missing structures. Table of Contents • • • • • • • • • • • • • • Economic Importance Of Algae Algae have the following beneficial effects: 1. Primary Producers: Algae have an excellent ability to absorb sunlight and carry out photosynthesis Thus these are major producers. They carry out more than 50% of food-fat marine animals. They also produce oxygen during photosynthesis in fresh water and marine ecosystem. This oxygen is consumed by aquatic animals for respiration 2. Source Of Food For Man: Photosynthesis is something that most people think of as being carried out by plants, but fungi do most of the work in our fresh and marine waters. • They store a ton of energy, which is why some green algae are eaten by humans. Dried Spirogyra and Oedogonium are also consumed by people, and kelps (brown algae) are eaten in China and Japan. • Chlorella is used in the preparation of cakes and pastries • Porphyra is eaten by man. These are also used in puddings and soups • Diatoms are a major source of food for mar...

What Is Algae? The word algae generally refer to a wide array of plants that share the name though not closely related. Although the exact origin of the word algae is unknown, the singular form, alga, is a Latin word that refers to seaweed. Some etymologists have theorized that the term algae may have its roots in the Latin language from the word algēre, which refers to the cold. However, the theory faces great opposition as the link between the plants and temperature is exceptionally small. Algae may range from simple unicellular organisms to more complex multicellular organisms like the giant kelp. Studies of some algae species have indicated that they do not have specialized tissue present in land plants like the xylem, phloem, and stomata. The absence of these cells is an evolutionary adaptation to the regions where the plants thrive. Algae have existed in the world over a long period with some fossils discovered in the Vindhya basin being close to 2 billion years old. Scientists have extensively studied the distribution patterns of algae as they are found in a significant number of areas around the world where they perform several vital functions. Ecological Importance of Algae As a Source of Oxygen One of the most important roles played by algae in the environment is the production of oxygen as a by-product in the process of photosynthesis. One of the similarities between land plants and several algae species is the presence of chlorophyll which allows them to form o...

Article shared by : The economic importance of algae is very diverse. Some of the algae are used as food and fodder, in agriculture, industry, medicine, purification of water, aviation and as a source of petroleum and natural gas. A brief account of the uses of algae is given below: (a) Algae Used as Food: The red, brown and green algae, growing along the coasts of the Pacific Ocean, are now extensively used as food. Ulva a green alga, commonly known as ‘sea lettuce’, is taken by man as a vege­table. Caulerpa racemosa, another green alga, is cultivated by the Philippinase for food. Chlorella, a green alga, contains vitamins A and B, which has food value equivalent to lemon juice The Japa­nese take chlorella powder along with green tea. Some of the brown algae, like Laminaria, Sargassum, Fucus etc., are taken as food by man, particularly by the Chinese and by the Japanese. Americans are fond of “seatron”, which is a preparation made from the bladders and stalks of Nereocystis, a brown algae. The red algae, like Porphyra, Chondrus, crispus, etc., are used in the pre­paration of soups, desserts and puddings. The people of the Western Europe, particularly of France and Denmark, like to take “blankmanges” delicious food, which is prepared by boiling an alga, like Chondrous, with milk and then mixed with fruit’s juice and scented with vanilla. Rhodymenia another red alga, is also taken by man. It has been observed that about 25%of marine algae are included within the food menu b...