NCERT Solutions Class 7 Science Chapter 1 Nutrition in Plants have been provided below and is also available in Pdf for free download. The NCERT solutions for Class 7 Science have been prepared as per the latest syllabus, NCERT books and examination pattern suggested in Class 7 by CBSE, NCERT and KVS. Questions given in NCERT book for Class 7 Science are an important part of exams for Class 7 Science and if answered properly can help you to get higher marks. Refer to more Chapter-wise answers for NCERT Class 7 Science and also download more latest study material for all subjects. Chapter 1 Nutrition in Plants is an important topic in Class 7, please refer to answers provided below to help you score better in exams
Chapter 1 Nutrition in Plants Class 7 Science NCERT Solutions
Class 7 Science students should refer to the following NCERT questions with answers for Chapter 1 Nutrition in Plants in Class 7. These NCERT Solutions with answers for Class 7 Science will come in exams and help you to score good marks
Chapter 1 Nutrition in Plants NCERT Solutions Class 7 Science
NCERT Solutions for Class 7 Science for chapter 1 Nutrition in Plants
Q.1 Why do organisms need to take food?
Ans. 1 Organisms take food to meet their requirements of nutrients and energy. Nutrients and energy enable the organisms to grow, reproduce and repair their damaged body parts.
Q.2 Distinguish between a parasite and a saprotroph.
Ans. 2 A parasite derives nutrition from the body of a living host by invading its tissues whereas, a saprotroph derives its nutrition from dead and decaying organic matter.
Examples of parasite: Cuscuta and leech
Examples of saprotrophs: Fungi and bacteria
Q.3 How would you test the presence of starch in leaves?
Ans. 3 The presence of starch in the leaves can be tested with the help of iodine solution that gives blue- black colour with starch. Boil few green leaves in alcohol in a test tube till they turn colourless or pale green. Then wash the leaves in tap water and transfer them into a petridish. Add some drops of iodine. A change in colour of leaves to blue-black indicates the presence of starch in them.
Q.4 Give a brief description of the process of synthesis of food in green plants.
Ans. 4 The leaves of green plants contain chlorophyll pigment which traps solar energy. This energy is utilized by the leaves for the synthesis of organic food from water and carbon dioxide. Water is absorbed by the roots and carbon dioxide is taken up from the atmosphere through the tiny pores called stomata. Thus, sunlight, chlorophyll, water and carbon dioxide are the important raw materials required for photosynthesis.
The process of photosynthesis can be summarised as follows:
Sunlight
CO2 + H2O -> Sunlight/Chlorophyll-> C6H12O6 + O2
Q.5 Show with the help of a sketch that the plants are the ultimate source of food.
Ans. 5 The following diagram depicts the synthesis of carbohydrates or glucose by the green plants in the presence of sunlight and the transfer of energy to herbivores and then, to carnivores on consumption:
Explanation: In this food chain we observe that carnivores like lions depend on herbivores for food and energy. A herbivore gets it food and energy by consuming plants. Plants manufacture their food with the help of sunlight. Thus herbivores and carnivores are all directly or indirectly dependent on plants for food.
Q.6 Fill in the blanks:
(a) Green plants are called________ since they synthesise their own food.
(b) The food synthesised by the plants is stored as_________.
(c) In photosynthesis solar energy is captured by the pigment called______.
(d) During photosynthesis plants take in_______and release________.
Ans. 6
(a) Autotrophs
(b) Starch
(c) Chlorophyll
(d) Carbon dioxide, Oxygen
Q.7 Name the following:
(i) A parasitic plant with yellow, slender and tubular stem.
(ii) A plant that has both autotrophic and heterotrophic modes of nutrition.
(iii) The pores through which leaves exchange gases.
Ans. 7
(a) Cuscuta
(b) Pitcher plant
(c) Stomata
Q.8 Tick the correct answer:
(a) Amar bel is an example of:
(i) autotroph
(ii) parasite
(iii) saprotroph
(iv) host
(b) The plant which traps and feeds on insects is:
(i) Cuscuta
(ii) china rose
(iii) pitcher plant
(iv) rose
Ans. 8 (a) Amarbel is an example of: (ii) parasite
(b) The plant which traps and feeds on insects is: (iii) pitcher plant
Q.9 Match the items given in Column I with those in Column II:
Column I |
Column II |
Chlorophyll |
Bacteria |
Nitrogen |
Heterotrophs |
Amarbel |
Pitcher plant |
Animals |
Leaf |
Insects |
Parasite |
Ans. 9 The correctly matched contents of Column I and
Column II are as follows:
Column I |
Column II |
Chlorophyll |
Leaf |
Nitrogen |
Bacteria |
Amarbel |
Parasite |
Animals |
Heterotrophs |
Insects |
Pitcher plant |
Q.10 Mark ‘T’ if the statement is true and ‘F’ if it is false:
(i) Carbon dioxide is released during photosynthesis. (T/F)
(ii) Plants which synthesise their food themselves are called saprotrophs. (T/F)
(iii) The product of photosynthesis is not a protein. (T/F)
(iv) Solar energy is converted into chemical energy during photosynthesis. (T/F)
Ans. 10
(i) False (ii) False (iii) True (iv) True
Q.11 Choose the correct option from the following: Which part of the plant takes in carbon dioxide from the air for photosynthesis?
(i) Root hair (ii) Stomata (iii) Leaf veins (iv) Sepals
Ans. 11 (ii) stomata
Q.12 Choose the correct option from the following: Plants take carbon dioxide from the atmosphere mainly through their:
(i) roots (ii) stem (iii) flowers (iv) leaves
Ans. 12 (iv) leaves
NCERT Solutions Class 7 Science Chapter 1 Nutrition in Plants |
NCERT Solutions Class 7 Science Chapter 2 Nutrition in Animals |
NCERT Solutions Class 7 Science Chapter 3 Fibre to Fabric |
NCERT Solutions Class 7 Science Chapter 4 Heat |
NCERT Solutions Class 7 Science Chapter 5 Acids Bases and Salts |
NCERT Solutions Class 7 Science Chapter 6 Physical and Chemical Changes |
NCERT Solutions Class 7 Science Chapter 7 Weather Climate and Adaptations of Animals to Climate |
NCERT Solutions Class 7 Science Chapter 8 Winds Storms and Cyclones |
NCERT Solutions Class 7 Science Chapter 9 Soil |
NCERT Solutions Class 7 Science Chapter 10 Respiration in Organisms |
NCERT Solutions Class 7 Science Chapter 11 Transportation in Animals and Plants |
NCERT Solutions Class 7 Science Chapter 12 Reproduction in Plants |
NCERT Solutions Class 7 Science Chapter 13 Motion and Time |
NCERT Solutions Class 7 Science Chapter 14 Electric Current and its Effects |
NCERT Solutions Class 7 Science Chapter 15 Light |
NCERT Solutions Class 7 Science Chapter 16 Water A Precious Resource |
NCERT Solutions Class 7 Science Chapter 17 Forests Our Lifeline |
NCERT Solutions Class 7 Science Chapter 18 Wastewater Story |
NCERT Solutions Class 7 Science Chapter 1 Nutrition in Plants
The above provided NCERT Solutions Class 7 Science Chapter 1 Nutrition in Plants is available on our website www.studiestoday.com for free download in Pdf. You can read the solutions to all questions given in your Class 7 Science textbook online or you can easily download them in pdf. The answers to each question in Chapter 1 Nutrition in Plants of Science Class 7 has been designed based on the latest syllabus released for the current year. We have also provided detailed explanations for all difficult topics in Chapter 1 Nutrition in Plants Class 7 chapter of Science so that it can be easier for students to understand all answers. These solutions of Chapter 1 Nutrition in Plants NCERT Questions given in your textbook for Class 7 Science have been designed to help students understand the difficult topics of Science in an easy manner. These will also help to build a strong foundation in the Science. There is a combination of theoretical and practical questions relating to all chapters in Science to check the overall learning of the students of Class 7.
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