7th Nutrition in plants Full Chapter | class 7 science |CBSE 7th science |NCERT class 7 Gradebooster

Grade booster15 minutes read

All organisms need essential nutrients from food to survive, with plants serving as a primary source for animals and humans through different modes of nutrition like photosynthesis and symbiotic relationships with fungi. Legumes host bacteria that convert nitrogen gas into usable form, creating a mutually beneficial symbiotic relationship beneficial for both bacteria and plants.

Insights

  • Living organisms, including animals and humans, rely on plants as the primary source of essential nutrients like carbohydrates, proteins, and fats, obtained through processes like photosynthesis and symbiotic relationships.
  • Symbiotic relationships between plants and organisms like fungi and bacteria, such as Rhizobium in legumes, highlight the interconnectedness of ecosystems where mutual benefits are exchanged, emphasizing the intricate web of nutrient cycles in nature.

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Recent questions

  • What are the essential nutrients for living organisms?

    Carbohydrates, proteins, fats, vitamins, and minerals are essential.

  • How do plants produce nutrients?

    Plants utilize carbon dioxide, water, sunlight, and minerals.

  • What is the role of nitrogen in plant nutrition?

    Nitrogen is crucial for converting carbohydrates into proteins.

  • How do fungi contribute to nutrition?

    Fungi act as decomposers and form symbiotic relationships with plants.

  • What is the significance of symbiosis between plants and bacteria?

    Symbiosis between plants and bacteria benefits both organisms.

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Summary

00:00

"Nutrition in Living Organisms: Plants and Fungi"

  • All living organisms require food, which includes carbohydrates, proteins, fats, vitamins, and minerals.
  • Nutrients are essential for the survival of living organisms, with plants being the primary source of nutrients for animals and humans.
  • Plants have different modes of nutrition, utilizing simple materials like carbon dioxide, water, sunlight, and minerals to produce important nutrients like carbohydrates, proteins, and fats.
  • Plants undergo photosynthesis, a process where they convert carbon dioxide and water into carbohydrates and oxygen with the help of chlorophyll in chloroplasts.
  • Nitrogen is crucial for plants to convert carbohydrates into proteins, and if not available in the soil, artificial fertilizers containing nitrogen can be used.
  • Some plants, like parasites and insectivorous plants, have unique modes of nutrition where they rely on other organisms for nutrients.
  • Fungi also play a role in nutrition, with some acting as decomposers and forming symbiotic relationships with plants to exchange nutrients and shelter.
  • Mushrooms are an example of fungi that follow a trophic mode of nutrition, growing on dead organic matter and spreading through fungal spores.
  • Improper storage of food items can lead to fungal growth, with fungi spreading from one spoiled item to another, utilizing the nutrients present.
  • Symbiosis between plants and fungi showcases a mutually beneficial relationship where both organisms provide shelter, nutrients, and other benefits to each other.

24:52

Legumes host bacteria for protein-rich growth.

  • Legumes like Bengal gram, green gram, black gram, and beans are rich in proteins due to their ability to host bacteria called Rhizobium in root nodules, which convert nitrogen gas into a form usable by plants, showcasing a symbiotic relationship beneficial for both bacteria and plants.
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