{"id":4181,"date":"2023-01-03T06:38:38","date_gmt":"2023-01-03T06:38:38","guid":{"rendered":"https:\/\/speedlabs.in\/blog\/?p=4181"},"modified":"2023-01-03T06:38:38","modified_gmt":"2023-01-03T06:38:38","slug":"nutrition-in-plants-class-7-chapter-1-science-notes","status":"publish","type":"post","link":"https:\/\/speedlabs.in\/blog\/nutrition-in-plants-class-7-chapter-1-science-notes\/","title":{"rendered":"Nutrition in Plants: Class 7 Chapter 1 Science Notes"},"content":{"rendered":"

Class 7<\/b>th<\/b> Science Chapter 1 Notes:<\/b> Revision Notes for CBSE<\/b> Class 7 Science Chapter 1 <\/b>can be easily accessed online by students who are preparing for their exams thoroughly.<\/span> Based on the updated syllabus, SpeEdLabs\u2019 experts have carefully crafted this <\/span>Nutrition in Plants revision notes<\/b>.<\/span> The objectives of these revision notes are to provide students with a solid foundation for understanding these topics in a specialised manner in higher classes.<\/span><\/p>\n

The <\/span>NCERT Notes for Class 7 Science chapter 1<\/b> teach students about <\/span>Plant Nutrition<\/b> and the processes by which these nutrients are derived. Prepare for your exam by downloading NCERT Solutions <\/span>Revision Notes PDF<\/b>. Students who are looking for better solutions can download <\/span>Science NCERT Solutions Class 7<\/b> to help them revise the complete syllabus and score more marks in their exams.<\/span><\/p>\n

Class 7 Science Chapter 1 Nutrition in Plants Notes<\/b><\/h1>\n

Introduction to Nutrition in Plants<\/b><\/h2>\n

Living and\u00a0 Organisms<\/b><\/h2>\n
    \n
  • Living organisms like human beings, plants and animals need food to survive and exist.<\/span><\/li>\n
  • Living organisms reproduce, respond to the environment and also adapt.<\/span><\/li>\n
  • Living organisms respire and excrete as well.<\/span><\/li>\n<\/ul>\n

    Cells<\/b><\/h2>\n

    Cells are tiny units that help make up a living organism. Hence, they are also called building blocks of an organism.<\/span><\/p>\n

      \n
    • A cell is constituted of three major parts :<\/span><\/li>\n
    • A thin outer layer called the cell membrane.<\/span><\/li>\n
    • A spherical structure located at the centre of the cell called a nucleus.<\/span><\/li>\n
    • A jelly-like substance that surrounds a nucleus called the cytoplasm.<\/span><\/li>\n<\/ul>\n

      Single and Multi-Cellular Organisms<\/b><\/h2>\n
        \n
      • Organisms that are made up of just one cell are called single-celled or Unicellular organisms. E.g.\u00a0 Amoeba<\/span><\/li>\n
      • Organisms with more than one cell in their body are called multicellular organisms.<\/span><\/li>\n
      • All human beings, plants and animals are multicellular organisms.<\/span><\/li>\n<\/ul>\n

        Nutrition<\/b><\/h2>\n

        Nutrition is the mode of taking food by an organism and its utilisation by the body.<\/span><\/p>\n

          \n
        • Nutrition is very important as the nutrients from the food consumed enables living organisms to build their bodies and grow.<\/span><\/li>\n
        • Nutrition helps to repair damaged parts and organs.<\/span><\/li>\n
        • Nutrition also provides energy for carrying out various functions.<\/span><\/li>\n<\/ul>\n

          Autotrophs and Heterotrophs<\/b><\/h2>\n

          Organisms that make food themselves are called autotrophs.<\/span><\/p>\n

            \n
          • Plants are an example of autotrophs as they make their own food using carbon dioxide, water and light energy<\/span><\/li>\n<\/ul>\n

            Organisms that rely on others and usually take in ready-made food made by the autotrophs are called heterotrophs.<\/span><\/p>\n

              \n
            • Animals and human beings are an example of heterotrophs as they depend on plants in many ways for their food.<\/span><\/li>\n<\/ul>\n

              Photosynthesis<\/b><\/h2>\n

              Photosynthesis is the process of synthesis of food by green plants.<\/span><\/p>\n

                \n
              • This process usually takes place in the leaves of plants.<\/span><\/li>\n
              • The process requires chlorophyll (green coloured pigment), sunlight, carbon dioxide and water.<\/span><\/li>\n<\/ul>\n

                Organelles<\/b><\/h2>\n
                  \n
                • Organelles are tiny cellular structures inside a cell and perform specific functions that are important for the cell.<\/span><\/li>\n
                • They are found in the cytoplasm of a cell.<\/span><\/li>\n
                • E.g. Chloroplast is the cell organelle that carries out photosynthesis.<\/span><\/li>\n<\/ul>\n

                  Chloroplasts<\/b><\/h2>\n
                    \n
                  • The chloroplast is a type of organelle that exists in plants.<\/span><\/li>\n
                  • These organelles contain chlorophyll, the green coloured pigment that is responsible for carrying out the process of photosynthesis in plants.<\/span><\/li>\n<\/ul>\n

                    Chlorophyll<\/b><\/h2>\n
                      \n
                    • Chlorophyll is the pigment that is responsible for the synthesis of food in green plants.<\/span><\/li>\n
                    • This pigment is green to its bearers and is abundantly found in leaves.<\/span><\/li>\n
                    • Chlorophyll is locked inside the chloroplast.<\/span><\/li>\n<\/ul>\n

                      Process of Photosynthesis<\/b><\/h2>\n

                      The process of photosynthesis takes place in the leaves, the \u201cfood factory\u201d of the plants.<\/span><\/p>\n

                        \n
                      • Carbon dioxide is taken in through tiny pores on the leaves called stomata.<\/span><\/li>\n
                      • Water and minerals that are required for the process are transported to the leaves from the roots through the stem.<\/span><\/li>\n
                      • Chlorophyll helps the leaves use the energy from the sunlight to prepare food using the carbon dioxide, water and minerals.<\/span><\/li>\n
                      • Oxygen is released as a by-product of this process.<\/span><\/li>\n<\/ul>\n

                        Nutrients Being Replenished in Soil<\/b><\/h2>\n

                        Nutrients<\/b><\/h2>\n
                          \n
                        • Plants absorb mineral nutrients from the soil in order to make their own food and for other important processes.<\/span><\/li>\n
                        • Soils need to be enriched with nutrients such as nitrogen, phosphorus, potassium etc. regularly.<\/span><\/li>\n
                        • \u00a0<\/span>Only then can we grow plants and keep them healthy.<\/span><\/li>\n
                        • There are 17 most important nutrients for plants.<\/span><\/li>\n
                        • 6 are called macronutrients and rest are called micronutrients.<\/span><\/li>\n
                        • Macronutrients are required in large quantities while micronutrients are required in very small quantities.<\/span><\/li>\n<\/ul>\n

                          Other Modes of Nutrition<\/b><\/h2>\n

                          Symbiotic Relationship<\/b><\/h2>\n

                          Organisms that live together and share their shelter and nutrients are said to be in a Symbiotic Relationship.<\/span><\/p>\n

                            \n
                          • Certain fungi live in the roots of trees.<\/span><\/li>\n
                          • The tree provides nutrients to the fungus and, in return, receives help from it to take up water and nutrients from the soil.<\/span><\/li>\n
                          • This association works well for both the fungi and the tree.<\/span><\/li>\n
                          • Another most common example is of Rhizobium bacteria.<\/span><\/li>\n
                          • They reside in the root nodules of leguminous plants.<\/span><\/li>\n
                          • The bacteria provide a plant with nitrogen that they fix and in turn, they get shelter and food from the plant.<\/span><\/li>\n<\/ul>\n

                            Rhizobium<\/b><\/h2>\n
                              \n
                            • Rhizobium is a type of bacteria that convert atmospheric nitrogen into a soluble form that can be utilised by plants (nitrogen fixation).<\/span><\/li>\n
                            • It usually resides in the roots of leguminous plants like peas, gram, moong etc. and is instrumental in providing these plants with a rich source of nitrogen.<\/span><\/li>\n<\/ul>\n

                              Nitrogen Fixation<\/b><\/h2>\n
                                \n
                              • Nitrogen is an important nutrient required for soil and for plants.<\/span><\/li>\n
                              • However, nitrogen in the atmosphere is not easily accessible.<\/span><\/li>\n<\/ul>\n

                                The process by which nitrogen is converted into a form that can be used by plants and other living organisms is called nitrogen fixation.<\/span><\/p>\n

                                Parasites<\/b><\/h2>\n

                                A parasite is a heterotroph that completely depends on another organism for its food.<\/span><\/p>\n

                                  \n
                                • The organism to which the parasite latches onto is called the host.<\/span><\/li>\n
                                • The host, in the process, is deprived of all nutrients for its own growth as they are consumed by the parasite.<\/span><\/li>\n
                                • For example, Cuscuta (Amarbel) is a non green plant that takes ready-made food from the plant on which it is growing.<\/span><\/li>\n<\/ul>\n

                                  Saprotrophs<\/b><\/h2>\n

                                  Organisms which rely on dead and decaying matter for their food are called Saprotrophs.<\/span><\/p>\n

                                    \n
                                  • This mode of nutrition is called saprotrophic nutrition.<\/span><\/li>\n
                                  • For example, Fungi.<\/span><\/li>\n
                                  • Fungi secrete digestive juices on the dead and decaying matter and convert it into a solution<\/span><\/li>\n
                                  • Then they absorb the nutrients from it.<\/span><\/li>\n<\/ul>\n

                                    Insectivorous Plants<\/b><\/h2>\n
                                      \n
                                    • These plants are green and carry out photosynthesis.<\/span><\/li>\n
                                    • But, they grow in nitrogen-deficient soils.<\/span><\/li>\n
                                    • \u00a0<\/span>So, in order to get nitrogen, they feed on insects.<\/span><\/li>\n
                                    • These insectivorous plants have their parts modified for attracting and catching insects.<\/span><\/li>\n
                                    • For example, The pitcher plant, Venous flytrap.<\/span><\/li>\n<\/ul>\n

                                      Cactus Plants<\/b><\/h2>\n
                                        \n
                                      • Most of the photosynthesis takes place in the leaves of green plants.<\/span><\/li>\n
                                      • However, in case of some desert plants, it takes place in their stem and even branches.<\/span><\/li>\n
                                      • \u00a0<\/span>Cacti are found in the desert and their leaves are modified to spines to avoid loss of water due to transpiration.<\/span><\/li>\n
                                      • Therefore, their green stems enable them to carry out the process of photosynthesis.<\/span><\/li>\n<\/ul>\n

                                        Class 7 Science Chapter 1 Nutrition in Plants: Key Features<\/b><\/h3>\n
                                          \n
                                        • The notes are available in PDF format for free<\/span><\/li>\n
                                        • It covers all important topics and sub-topics of <\/span>Nutrition in Plants<\/b><\/li>\n
                                        • Easy-to-understand explanations<\/span><\/li>\n
                                        • Precise short notes<\/span><\/li>\n
                                        • Prepared by SpeEdLabs\u2019 Biology subject-experts<\/span><\/li>\n
                                        • \u00a0<\/span>All the topics are explained with proper examples, diagrams, and definitions.<\/span><\/li>\n
                                        • \u00a0<\/span>These notes are as per the updated <\/span>CBSE syllabus for Class 7 Science<\/b><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"

                                          Class 7th Science Chapter 1 Notes: Revision Notes for CBSE Class 7 Science Chapter 1…<\/p>\n","protected":false},"author":1,"featured_media":4182,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[6],"tags":[1847,1846,1845],"yoast_head":"\nNutrition in Plants: Class 7 Chapter 1 Science Notes - SpeedLabs Blog<\/title>\n<meta name=\"robots\" content=\"noindex, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Nutrition in Plants: Class 7 Chapter 1 Science Notes - SpeedLabs Blog\" \/>\n<meta property=\"og:description\" content=\"Class 7th Science Chapter 1 Notes: Revision Notes for CBSE Class 7 Science Chapter 1…\" \/>\n<meta property=\"og:url\" content=\"https:\/\/speedlabs.in\/blog\/nutrition-in-plants-class-7-chapter-1-science-notes\/\" \/>\n<meta property=\"og:site_name\" content=\"SpeedLabs Blog\" \/>\n<meta property=\"article:published_time\" content=\"2023-01-03T06:38:38+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/speedlabs.in\/blog\/wp-content\/uploads\/2023\/01\/Jan03Blog428-scaled.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"2560\" \/>\n\t<meta property=\"og:image:height\" content=\"1755\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"admin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"admin\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"6 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/speedlabs.in\/blog\/nutrition-in-plants-class-7-chapter-1-science-notes\/\",\"url\":\"https:\/\/speedlabs.in\/blog\/nutrition-in-plants-class-7-chapter-1-science-notes\/\",\"name\":\"Nutrition in Plants: Class 7 Chapter 1 Science Notes - 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