NCERT Exemplar Solution for Class 7 Science Chapter-1 Nutrition in Plants
Plants are the primary source of food for every living organism on Earth, and understanding how they prepare and obtain nutrients is the main focus of this chapter. The chapter “Nutrition in Plants” introduces students to the fascinating process of food preparation in green plants through photosynthesis and explains the importance of sunlight, chlorophyll, carbon dioxide, and water. It also discusses different modes of nutrition, such as autotrophic and heterotrophic nutrition, along with insectivorous and parasitic plants. The NCERT Exemplar Solution for Class 7 Science helps students build strong conceptual understanding by offering detailed explanations and application-based questions. With the help of the NCERT Exemplar Solution for class 7, learners can improve analytical thinking and prepare effectively for school exams. These NCERT solutions for class 7 are highly useful for understanding scientific terms, diagrams, and real-life examples related to plant nutrition.
Find the Exercises PDF of NCERT Exemplar Solution for Class 7 Science Chapter-1 Nutrition in Plants
Photosynthesis and Food Preparation in Plants
One of the most important concepts covered in this chapter is photosynthesis. Green plants are known as autotrophs because they can prepare their own food with the help of sunlight. Chlorophyll, present in the leaves, traps sunlight and helps convert carbon dioxide and water into glucose and oxygen. This process is essential not only for plants but also for all living beings because it provides food and oxygen to the environment.
Students learn that leaves are called the “food factories” of plants. Tiny pores called stomata allow the exchange of gases during photosynthesis. Roots absorb water and minerals from the soil, which are transported to leaves through stems. The glucose produced during photosynthesis is either used immediately or stored in the form of starch. The exemplar solutions explain every step of photosynthesis with simple examples and scientific clarity. Questions based on diagrams, experiments, and reasoning improve students’ ability to apply theoretical concepts practically. Understanding this topic also helps students connect science with nature and environmental balance.
Types of Nutrition in Plants
The chapter also introduces different modes of nutrition found in plants. While most plants are autotrophs, some plants depend partly or completely on other organisms for food. These are called heterotrophs.
Parasitic plants obtain nutrients from host plants. A common example is Cuscuta, also known as Amarbel, which wraps itself around another plant and absorbs nutrients. Saprotrophs like mushrooms feed on dead and decaying matter by secreting digestive juices outside their bodies. This process helps in recycling nutrients in nature. Another interesting category discussed is insectivorous plants. Plants like pitcher plants trap insects and digest them to obtain nutrients, especially nitrogen. These plants usually grow in nitrogen-deficient soils. Such examples make the chapter engaging and help students understand how plants adapt to different environments. The NCERT exemplar questions encourage students to compare various nutritional modes and identify the characteristics of each type. These practice questions strengthen observation skills and scientific reasoning.
Importance of Nutrients and Symbiotic Relationships
The chapter further explains how nutrients are necessary for the healthy growth of plants. Along with sunlight and water, plants require minerals such as nitrogen, phosphorus, and potassium. Nitrogen is especially important for growth and protein formation. Some bacteria present in the soil help plants obtain nitrogen naturally.
The relationship between Rhizobium bacteria and leguminous plants is an example of symbiosis. In this association, bacteria live in the root nodules of plants and convert atmospheric nitrogen into a usable form. In return, the plants provide shelter and food to the bacteria. Lichens are another example of symbiosis, where algae and fungi live together and support each other. This topic teaches students the importance of cooperation in nature and how living organisms depend on one another for survival. The exemplar solutions include conceptual and activity-based questions that make learning interactive and informative.
Students also learn about nutrient replenishment in soil and why farmers use fertilizers and crop rotation techniques. These concepts help learners understand agriculture and environmental conservation in a simple way.
Benefits of Studying NCERT Exemplar Solutions
The NCERT Exemplar Solution for Class 7 Science Chapter-1 Nutrition in Plants is designed to improve conceptual understanding and problem-solving skills. The solutions provide step-by-step explanations for every question, making it easier for students to understand difficult concepts. They also help students practice objective questions, short answers, and long descriptive questions. By solving exemplar questions regularly, students become familiar with exam patterns and improve their confidence. These solutions are especially useful for revising important topics before tests and school examinations. The chapter also builds a strong foundation for advanced science topics in higher classes.
The language used in exemplar solutions is simple, student-friendly, and focused on developing scientific thinking. Students can improve their understanding of plant life, food chains, and environmental balance through regular practice.