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Nutrition in Plants

Gujarat Board · Class 7 · Science

Quick revision notes for Nutrition in Plants — Gujarat Board Class 7 Science. Key concepts, formulas, and definitions for last-minute revision.

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A flowchart illustrating the inputs, key events, and outputs of photosynthesis, including the role of sunlight, chlorophyll, carbon dioxide, and water.
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Key Topics to Revise

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1. Nutrition and Its Types

  • Nutrition is the mode of taking food by an organism and its utilisation by the body.
  • Nutrients are the components of food (carbohydrates, proteins, fats, vitamins, minerals) that are necessary for the body.
  • Autotrophic nutrition: Organisms make their own food from simple substances like CO₂, water, and minerals. Plants follow this mode.
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2. Photosynthesis — The Food-Making Process in Plants

  • Leaves are the food factories of plants.
  • Chlorophyll is the green pigment present in leaves that captures sunlight energy.
  • The four essential requirements for photosynthesis are: Chlorophyll, Sunlight, Carbon dioxide (CO₂), and Water.
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3. Other Modes of Nutrition in Plants

  • Not all plants have chlorophyll — some plants use heterotrophic modes of nutrition.
  • PARASITIC NUTRITION: Some plants without chlorophyll take readymade food from other living plants (the host). Example: Cuscuta (Amarbel).
  • Cuscuta is a yellow, wiry, branched plant that twines around the stem and branches of the host plant. It has no chlorophyll.
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4. Saprotrophic Nutrition and Symbiosis

  • SAPROTROPHIC NUTRITION: Organisms absorb nutrients from dead and decaying organic matter by secreting digestive juices onto the food and then absorbing it.
  • Organisms using this mode are called SAPROTROPHS. Examples: Fungi (mushrooms, bread mould), some bacteria.
  • Fungi do not have chlorophyll and cannot photosynthesise — they are heterotrophs.

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Key Concepts

Autotrophic nutrition is the modeHeterotrophic nutrition is the modePhotosynthesis is the process byChlorophyll is a green pigment foundStomata are tiny pores found on

Frequently Asked Questions

What are the important topics in Nutrition in Plants for Gujarat Board Class 7 Science?
Key topics in Nutrition in Plants include Nutrition in Plants — Complete Chapter Overview, Nutrition in Plants – Complete Concept Overview, Modes of Nutrition in Organisms. These are the concepts Gujarat Board Class 7 examiners draw on most — study them first, then practise related questions.
How to score full marks in Nutrition in Plants — Gujarat Board Class 7 Science?
Understand the core concepts first, then work through the 45 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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