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Revision Notes
Nutrition in Plants — Revision Notes
Gujarat Board · Class 7 · Science
Nutrition in Plants revision notes for Gujarat Board Class 7 Science: 4 topics in quick points. Part of the Gujarat Board Class 7 Science syllabus.
45 questions5 concepts
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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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Full NotesKey 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 and Its Types, Photosynthesis — The Food-Making Process in Plants, Other Modes of Nutrition in Plants, Saprotrophic Nutrition and Symbiosis. Study these first, then practise questions on each for Class 7 exams.
How should I revise Nutrition in Plants for Class 7 exams?
Learn the core ideas first, then work through the 45 practice questions on Nutrition in Plants. Revise 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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