CBSE Class 9 Science Exemplar Chapter 14: Improvement in Food Resources NCERT Solutions
This chapter delves into the crucial topic of 'Improvement in Food Resources' for CBSE Class 9 Science. It covers essential aspects of enhancing food production through various agricultural practices and animal husbandry techniques. The NCERT Solutions provide detailed explanations for multiple-choice questions and other exercises, focusing on understanding crop varieties, crop protection, animal husbandry, beekeeping, and fisheries. These solutions aim to clarify complex concepts, helping students grasp the importance of food security and sustainable agricultural methods. By working through these solutions, students can reinforce their learning, prepare effectively for exams, and develop a deeper appreciation for the science behind feeding a growing population.
Quick info
| Board | CBSE |
|---|---|
| Class | Class 9 |
| Subject | Science Exemplar |
| Session | 2026 |
| Language | English |
| Type | NCERT Solutions |
| Chapter | Chapter 14 |
Chapter summary
Chapter 14 of the CBSE Class 9 Science Exemplar focuses on 'Improvement in Food Resources'. The NCERT Solutions cover key concepts related to increasing food production, including crop improvement, crop protection from pests and diseases, and animal husbandry practices like poultry, dairy, and fisheries. The solutions explain various agricultural revolutions and sustainable farming methods, providing a clear understanding of how to enhance food availability while considering environmental impact. This chapter is vital for understanding food security and modern agricultural techniques.
Learning outcomes
- Identify oil-yielding plants and carbohydrate sources.
- Understand the concepts of White Revolution and Blue Revolution.
- Define sustainable agriculture and its importance.
- Explain the necessity of increased food production and accessibility.
- Differentiate between various types of hybridization.
- Recognize the impact of weeds on crop production.
- Identify different species of honey bees.
Topics covered
Paper topics
- Improvement in Food Resources
- Crop Production
- Crop Varieties
- Crop Protection
- Weeds and Pest Control
- Animal Husbandry
- Poultry
- Dairy Farming
- Beekeeping
- Fisheries
- Sustainable Agriculture
- Food Security
Important topics
- Crop Improvement and Protection
- Animal Husbandry Practices
- Sustainable Agriculture
- Agricultural Revolutions (White and Blue)
- Role of Beekeeping and Fisheries
- Impact of Weeds
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Questions and Solutions
Chapter 15 Improvement in Food resources.
Multiple Choice Questions
- Which one is an oil yielding plant among the following0?
- Lentil
- Sunflower
- Cauliflower
- Hibiscus
Soln:
Answer is (b) Sunflower
Explanation:
Lentisls are pulse yielding tree. Cauliflower is a vegetable and Hibiscus is a flower, whereas Sunflower is used to make oil. Soln:
- Which one is not a source of carbohydrate?
- Rice
- Millets
- Sorghum
- Gram
Soln: Answer is (d) Gram
Explanation:
Rice millets and sorghum has carbohydrates in them as a major source of energy. Whereas Gram is a di-cotyledon which is rich in proteins hence gram is the answer.
- Find out the wrong statement from the following
- White revolution is meant for increase in milk production
- Blue revolution is meant for increase in fish production
- Increasing food production without compromising with environmental quality is called as sustainable agriculture
- None of the above
Soln: Answer is (d) None of the above
Explanation:
Statements provided in option a), b) and c are right statements hence answer is d) none of the above.
- To solve the food problem of the country, which among the following is necessary?
- Increased production and storage of food grains
- Easy access of people to the food grain
- People should have money to purchase the grains
- All of the above
Soln:
Answer is (d) All of the above
5. Find out the correct sentence
(i) Hybridisation means crossing between genetically dissimilar plants
- Cross between two varieties is called as inter specific hybridisation
- Introducing genes of desired character into a plant gives genetically modified crop
- Cross between plants of two species is called as inter varietal hybridisation
- (i) and (iii)
- (ii) and (iv)
- (ii) and (iii)
- (iii) and (iv) Soln:
Answer is (a) (i) and (iii)
- Weeds affect the crop plants by
- killing of plants in field before they grow
- dominating the plants to grow (
- competing for various resources of crops (plants) causing low availability of nutrients
- all of the above
Soln:
Answer is c) competing for various resources of crops (plants) causing low availability of nutrients
Explanation:
Few weeds are poisonous but it will not affect the crop plant. Weeds compete for the nutrients and water available in the soil. This makes the crop plant gets lesser nutrients than the requirement which lead to decrease of the crop yield.
- Which one of the following species of honey bee is an Italian species?
- Apis dorsata
- Apis florae
- Apis cerana indica
- Apis mellifera
Common mistakes
- Confusing protein-rich sources with carbohydrate sources.
- Misinterpreting the definitions of agricultural revolutions.
- Incorrectly identifying the effects of weeds on crops.
- Confusing inter-specific and inter-varietal hybridization.
Revision tips
- Focus on understanding the definitions of key terms like sustainable agriculture and hybridization.
- Memorize the main objectives of agricultural revolutions (White, Blue).
- Pay attention to the differences between various crop protection methods and their impacts.
- Review the characteristics of different animal husbandry practices covered in the chapter.
Practice MCQs
Q1. Which of the following plants is primarily known for its oil yield?
Explanation: Sunflower is cultivated for its seeds, from which edible oil is extracted. Lentils are pulses, cauliflower is a vegetable, and hibiscus is typically grown for its flowers.
Q2. Identify the food item that is NOT a significant source of carbohydrates.
Explanation: Rice, millets, and sorghum are staple grains rich in carbohydrates. Gram, a legume, is primarily a good source of protein.
Q3. Which statement accurately describes a concept related to food production?
Explanation: The White Revolution is for milk production, and the Blue Revolution is for fish production. Sustainable agriculture emphasizes increasing food production while maintaining environmental quality.
Q4. What is essential to address the food problem of a country?
Explanation: Solving the food problem requires a multi-faceted approach including increased production, efficient storage, accessibility, and affordability of food grains for the population.
Q5. What does hybridization mean in the context of plant breeding?
Explanation: Hybridization generally refers to the process of crossing between genetically dissimilar parents. Specifically, crossing between two varieties is called inter-varietal hybridization, and crossing between two species is inter-specific hybridization. Option (i) and (iii) in the source refer to these concepts.
Q6. How do weeds primarily affect crop plants?
Explanation: While weeds can hinder growth, their main impact is competing with crops for limited resources such as sunlight, water, and soil nutrients, which ultimately lowers the crop yield. Some weeds can be poisonous, but this is not their primary effect on crop plants.
Q7. Which species of honey bee is known to be of Italian origin?
Explanation: Apis mellifera is the scientific name for the European or Italian honey bee, widely used in beekeeping worldwide for its productivity and docile nature.
Frequently asked questions
What is the main focus of Chapter 14, 'Improvement in Food Resources' for Class 9 Science?
This chapter focuses on methods to increase food production and improve its quality through scientific practices in agriculture and animal husbandry, ensuring food security.
What are the key agricultural practices discussed in these NCERT Solutions?
The solutions cover crop improvement (varieties, protection), animal husbandry (poultry, dairy, fisheries), beekeeping, and the importance of sustainable agriculture.
How do these NCERT Solutions help students prepare for exams?
They provide clear, rewritten explanations for each question, helping students understand concepts, identify key terms, and learn the correct methods for answering questions related to food resources.
What is the significance of 'sustainable agriculture' as explained in the solutions?
Sustainable agriculture means increasing food production without compromising the quality of the environment, ensuring long-term food availability and ecological balance.
Which agricultural revolutions are mentioned in the chapter?
The chapter mentions the White Revolution (increase in milk production) and the Blue Revolution (increase in fish production).
How are weeds explained in the context of crop production?
Weeds are explained as plants that compete with crop plants for essential resources like nutrients, water, and sunlight, thereby reducing the overall yield of the crops.
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