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  1. India’s Biogas Program, launched by the Ministry of New and Renewable Energy, promotes the use of biodegradable waste like cow dung for producing biogas. These plants reduce pollution, generate clean energy and produce organic manure. Especially useful in rural areas, the program helps manage wasteRead more

    India’s Biogas Program, launched by the Ministry of New and Renewable Energy, promotes the use of biodegradable waste like cow dung for producing biogas. These plants reduce pollution, generate clean energy and produce organic manure. Especially useful in rural areas, the program helps manage waste and provides an eco-friendly alternative to firewood and LPG, supporting sustainable and cost-effective energy solutions.

     

    For more NCERT Solutions for Class 8 Science Curiosity Chapter 2 The Invisible Living World: Beyond Our Naked Eye Extra Questions & Answer:

    https://www.tiwariacademy.com/ncert-solutions/class-8/science/

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  2. (i) In flask A, yeast ferments the sugar, releasing carbon dioxide. (ii) In test tube B, gas bubbles appear, showing the presence of CO₂. (iii) Without yeast in flask A, fermentation doesn’t happen, so no gas is released and the test tube B remains unchanged. This experiment demonstrates that yeastRead more

    (i) In flask A, yeast ferments the sugar, releasing carbon dioxide.
    (ii) In test tube B, gas bubbles appear, showing the presence of CO₂.
    (iii) Without yeast in flask A, fermentation doesn’t happen, so no gas is released and the test tube B remains unchanged. This experiment demonstrates that yeast is essential for fermentation and gas production.

     

    For more NCERT Solutions for Class 8 Science Curiosity Chapter 2 The Invisible Living World: Beyond Our Naked Eye Extra Questions & Answer:

    https://www.tiwariacademy.com/ncert-solutions/class-8/science/

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  3. Traditional fermented foods like idli, dosa, curd, pickles and fermented rice are prepared using microorganisms like yeast and Lactobacillus. These foods promote gut health, improve digestion and enhance nutritional value. Fermentation also preserves food naturally. In many cultures, such foods holdRead more

    Traditional fermented foods like idli, dosa, curd, pickles and fermented rice are prepared using microorganisms like yeast and Lactobacillus. These foods promote gut health, improve digestion and enhance nutritional value. Fermentation also preserves food naturally. In many cultures, such foods hold historical and health significance, passed down through generations for their taste and medicinal benefits.

     

    For more NCERT Solutions for Class 8 Science Curiosity Chapter 2 The Invisible Living World: Beyond Our Naked Eye Extra Questions & Answer:

    https://www.tiwariacademy.com/ncert-solutions/class-8/science/

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  4. To study mushroom parts, collect a mature mushroom and observe its external parts—cap, stalk and gills—using a magnifying glass. With a foldscope or microscope, examine spores and cell structures on the gills. Seniors or teachers can guide you. This study helps understand fungi’s reproductive partsRead more

    To study mushroom parts, collect a mature mushroom and observe its external parts—cap, stalk and gills—using a magnifying glass. With a foldscope or microscope, examine spores and cell structures on the gills. Seniors or teachers can guide you. This study helps understand fungi’s reproductive parts and structure, enhancing knowledge of non-green organisms that play important ecological roles in decomposition.

     

    For more NCERT Solutions for Class 8 Science Curiosity Chapter 2 The Invisible Living World: Beyond Our Naked Eye Extra Questions & Answer:

    https://www.tiwariacademy.com/ncert-solutions/class-8/science/

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  5. After interacting with a mushroom-growing entrepreneur, I learnt the following steps for cultivating mushrooms: Steps for Mushroom Cultivation: Selection of Mushroom Type Common types include Oyster, Button, and Milky mushrooms. Each requires different conditions. Preparation of Substrate SubstrateRead more

    After interacting with a mushroom-growing entrepreneur, I learnt the following steps for cultivating mushrooms:

    Steps for Mushroom Cultivation:

    1. Selection of Mushroom Type
      • Common types include Oyster, Button, and Milky mushrooms. Each requires different conditions.
    2. Preparation of Substrate
      • Substrate is the material used for growing mushrooms, such as paddy straw, sawdust, or compost.
      • The substrate is cut into pieces and soaked in water for several hours.
    3. Pasteurisation
      • The wet substrate is steamed or heated to kill unwanted microbes. This prevents contamination.
    4. Spawning
      • Mushroom spawn (seed) is mixed with the cooled substrate evenly.
    5. Bag Filling and Incubation
      • The substrate with spawn is filled into poly bags or trays, with small holes for air.
      • Bags are kept in a dark, warm, and humid room (around 25–28°C) for 15–20 days until white fungal threads (mycelium) spread.
    6. Fruiting Stage
      • After incubation, bags are opened and moved to a cooler, lighted space with good air circulation and high humidity.
      • Mushrooms start forming within 1–2 weeks.
    7. Harvesting
      • Mushrooms are ready to be harvested when the cap opens fully. They are carefully twisted and plucked by hand.
    8. Packaging and Selling
      • Fresh mushrooms are cleaned, packed in plastic trays or pouches, and sold in the market. Some are dried for storage.

     

    🌱 Key Requirements:

    • Clean environment
    • Proper humidity and ventilation
    • Temperature control
    • Fresh, sterilised substrate
    • Hygiene to prevent contamination

     

    For more NCERT Solutions for Class 8 Science Curiosity Chapter 2 The Invisible Living World: Beyond Our Naked Eye Extra Questions & Answer:

    https://www.tiwariacademy.com/ncert-solutions/class-8/science/

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