This video explains how plants derive their nutrition
Introduction to CBSE Class 7 Science Chapter "Nutrition in Plants"
In the “Nutrition in Plants” chapter of CBSE Class 7 Science, students are introduced to the various methods through which plants obtain their nutrition. The chapter begins by defining what nutrition is and why it is vital for living organisms, including plants. It discusses the process of photosynthesis — a critical procedure whereby green plants make their food using sunlight, carbon dioxide from the air, and water from the soil, releasing oxygen in the process.
The chapter further delves into different types of nutrition in plants such as autotrophic and heterotrophic nutrition, emphasizing how plants like the Venus flytrap and pitcher plant may sometimes depend on insects as a source of nutrition. Concepts like saprotrophic nutrition, where organisms feed on dead and decaying matter, and symbiotic relationships, where plants live together and benefit from each other, are also explored.
With illustrative diagrams and engaging activities, the chapter aims to cultivate an understanding of how essential nutrients are for plant growth and the sustainability of our ecosystem.
Assignments for CBSE Class 7 Science Chapter “Nutrition in Plants”
- Create a Photosynthesis Poster: Design a creative poster that explains the process of photosynthesis.
- Investigate Plant Nutrition: Grow a small plant and record your observations on how it obtains its nutrients.
- Nutrition Hunt: Identify plants in your surroundings and categorize them based on their type of nutrition.
- Symbiotic Relationship Study: Research and present a case study on a unique symbiotic relationship between two plant species.
- Experiment with Light: Conduct an experiment by placing a plant in the dark and one in the light to observe the differences in their health and growth.
Conclusion
“Nutrition in Plants” is a chapter that beautifully unravels the silent, yet dynamic, life of plants. It broadens students’ understanding of the natural world, highlighting the intricacies of plant life and the pivotal role of nutrition in sustaining ecosystems. This knowledge nurtures a sense of wonder and respect for the plant kingdom and its contribution to life on Earth.
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Questions and Answers for CBSE Class 7 Science Chapter "Nutrition in Plants"
- Q1: What is autotrophic nutrition? ANS: Autotrophic nutrition is the process by which plants make their own food using substances like carbon dioxide and water in the presence of sunlight and chlorophyll.
- Q2: How do plants carry out photosynthesis? ANS: Plants carry out photosynthesis by absorbing water through their roots, taking in carbon dioxide from the air, and using sunlight to convert these into glucose and oxygen.
- Q3: What is chlorophyll, and why is it important? ANS: Chlorophyll is a green pigment found in the chloroplasts of plant cells, essential for absorbing light energy needed for photosynthesis.
- Q4: What are saprotrophs? ANS: Saprotrophs are organisms that feed on dead and decaying matter by secreting digestive juices and absorbing the nutrients.
- Q5: Can plants be carnivorous? Give an example. ANS: Yes, some plants can be carnivorous, like the Venus flytrap, which captures and digests insects.
- Q6: What role do nutrients play in plant growth? ANS: Nutrients are vital for plant growth as they are the building blocks of plant cells and are needed for vital functions like growth, reproduction, and photosynthesis.
- Q7: What is parasitism in plants? ANS: Parasitism in plants occurs when one plant, the parasite, takes nutrients from another plant, the host, harming it in the process.
- Q8: Explain a symbiotic relationship in plants. ANS: A symbiotic relationship in plants is a mutual relationship where both organisms benefit, such as the relationship between leguminous plants and nitrogen-fixing bacteria.
- Q9: Why is sunlight important for plants? ANS: Sunlight is important for plants as it provides the energy required for photosynthesis to produce food for the plant.
- Q10: How do insectivorous plants obtain nutrition? ANS: Insectivorous plants obtain nutrition by trapping and digesting insects, which supplements their nutrient intake, especially in nitrogen-poor soils.
