NCERT Solutions Class 7 Science Chapter 1 Nutrition in Plants – Here are all the NCERT solutions for Class 7 Science Chapter 1. This solution contains questions, answers, images, explanations of the complete chapter 1 titled Nutrition in Plants From of Science taught in class 7. If you are a student of class 7 who is using NCERT Textbook to study Science, then you must come across chapter 1 Nutrition in Plants. After you have studied lesson, you must be looking for answers of its questions. Here you can get complete NCERT Solutions for Class 7 Science Chapter 1 Nutrition in Plants in one place.
NCERT Solutions Class 7 Science Chapter 1 Nutrition In Plants
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For a better understanding of this chapter, you should also see summary of Chapter 1 Nutrition In Plants , Science, Class 7.
Nutrition In Plants
NCERT Solutions Class 7 Science chapter 1 Nutrition In Plants
Class 7, Science chapter 1, Nutrition In Plants solutions are given below in PDF format. You can view them online or download PDF file for future use.
Nutrition In Plants
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Question & Answer
Q.1: Why do organisms take food?
Ans : All living organisms require food to survive. It gives them energy to perform various activities. All activities such as playing, running, walking, studying, etc. require energy. The various components present in our food such as carbohydrates, proteins, fats, vitamins, and minerals provide energy to our body. These are also important for growth and development of the body.
Q.2: How would you test the presence of starch in leaves?
Ans : Experiment to test the presence of starch in leaves: Take two healthy green potted plants of the same type. Keep one potted plant in a dark room for one or two days in order to remove all the starch from the leaves. Keep the other plant in sunlight. Now, take one leaf from each potted plant and put a few drops of iodine solution on them. Then note down the observation. Plants kept in light and dark conditions No blue black colour will be observed on the leaves of the plant kept in the dark room.This indicates the absence of starch. Blue black colour will be observed on the leaves of the plant kept in sunlight. This indicates the presence of starch.
Q.3: Give a brief description of the process of synthesis of food in green plants.
Ans : Photosynthesis is defined as the process in which the chlorophyll-containing plant cells synthesise food in the form of carbohydrates, using carbon dioxide and water in the presence of solar energy. Photosynthesis Sources of raw materials required for photosynthesis: (a) Water is taken in from the roots of the plant and is transported to the leaves. (b) Carbon dioxide from the air enters the leaves through the tiny pores called stomata and diffuses to the cells containing chlorophyll. (c) Solar energy is used to break water into hydrogen and oxygen. This hydrogen is combined with carbon dioxide to form food for the plants, which is ultimately used by the animals as well. Thus, photosynthesis can be represented by the following equation.
Q.4: Show with the help of a sketch that plants are the ultimate source of food.
Ans : Photosynthesis
Q.5: Fill in the blanks: (a) Green plants are called _________________ since they synthesise their own food. (b) The food synthesised by plants is stored as _________________. (c) In photosynthesis solar energy is absorbed by the pigment called ___________. (d) During photosynthesis plants take in ______________________ and release __________________ gas.
Ans : (a) Green plants are called autotrophs since they synthesise their own food. (b) The food synthesised by the plants is stored as starch. (c) In photosynthesis solar energy is captured by the pigment called chlorophyll. (d) During photosynthesis plants take in carbon dioxide and release oxygen.
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