NCERT Solutions for Class 9 Biology

Q: Question 1. A baby is not able to tell her/his caretakers that she/he is sick. What would help us to find out? (a) That the baby is sick? (b) What is the sickness?

Answer: Baby is too small to complain of its own. During such cases, the following symptoms should be checked for, as these are the common symptoms seen when the baby is ill. They are: (a) Increase in body temperature. (b) Constant crying. (c) Watering of the eyes. (d) Not eating food. (e) Vomiting and diarrhoea. Sickness is a condition used to refer to physical illness or disease.

Q: Question 2. Under which of the following conditions is a person most likely to fall sick? (a) When she is recovering from malaria. (b) When she has recovered from malaria and is taking care of someone suffering from chicken-pox. (c) When she is on a four-day fast after recovering from malaria and is taking care of someone suffering from chicken-pox. Why?

Answer: A person is more likely to fall sick when she is on a four-day fast after recovering from malaria and is taking care of someone suffering from chickenpox. This is because since she has suffered from malaria and is in the recovery phase, it means that she is still not completely diseases-free. Fasting affects the immune system as the body is deprived of essential nutrients required to maintain a healthy body. Chickenpox is a contagious disease, this also makes her susceptible to contracting the disease while taking care of a person suffering from chickenpox.

Q: Question 3. A doctor/nurse/health-worker is exposed to more sick people than others in the community. Find out how she/he avoids getting sick herself/himself.

Answer: Medical personnel are constantly in contact with the sick and diseased people coming in the hospitals for the treatment. They follow various measures in order to prevent themselves from getting infected: 1. They avoid eating or sharing food with patients. 2. They are always in hospital scrubs to protect themselves in situations where there is spillage of blood or body fluids on them. 3. Hospital is always kept clean. 3. Use of sanitizers and disinfectants wherever required. 4. Use of gloves while attending a patient.

Q: Question 4. Conduct a survey in your neighbourhood to find out what the three most common diseases are. Suggest three steps that could be taken by your local authorities to bring down the incidence of these diseases.

Answer: Common diseases are dysentery, viral fever and jaundice. Preventive measures are: (a) Maintaining the neighbourhood clean, i.e., removal of garbage and storing it in covered place until it is disposed of. (b) Filling up of the potholes and ditches, where water stagnates and creates a breeding place for mosquitoes. (c) The timely spray of chemicals in the surroundings to kill mosquitoes. (c) Provision of safe drinking water. (d) Arrangement of social programmes to educate people about the prevention of diseases.

Table of content

1 NCERT Solutions for Class 9 Biology

1.1 NCERT Solutions for Class 9 Biology Chapterwise

1.2 Class 9 Biology NCERT Solutions Chapterwise

1.3 NCERT Solutions for Class 9 Biology Chapter 1 Fundamental Units of Life

1.4 NCERT Solutions for Class 9 Biology Chapter 2 Tissues

1.5 NCERT Solutions for Class 9 Biology Chapter 3 Diversity in Living Organisms

1.6 NCERT Solutions for Class 9 Biology Chapter 4 Why do we fall ill?

1.7 NCERT Solutions for Class 9 Biology Chapter 5 Natural Resources

1.8 NCERT Solutions for Class 9 Biology Chapter 6 Improvement in Food Resources

2 Download Toppr – Best Learning App for Class 5 to 12

NCERT Solutions for Class 9 Biology

NCERT is on the priority list of recommendation of the Central Board of Secondary Education (CBSE). Here, you will find all the chapter-wise NCERT Solutions for Class 9 Biology. It will help you to understand the subject and perform well in exams.

Biology along with having a good weight in exams is equally important from experiment and practical point of view. In order to understand the chapters in biology, NCERT solutions play an important role. Here, on Toppr.com, you will find high quality of NCERT solutions prepared by a special team of experts. Moreover, the team is available to clear your doubts.

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NCERT Solutions for Class 9 Biology Chapterwise

Class 9 Biology Chapter 1 Fundamental Units of Life

Class 9 Biology Chapter 2 Improvement in Food Resources

Class 9 Biology Chapter 3 Diversity in Living Organisms

Class 9 Biology Chapter 4 Why do we fall ill?

Class 9 Biology Chapter 5 Natural Resources

Class 9 Biology Chapter 6 Tissues

Class 9 Biology NCERT Solutions Chapterwise

NCERT Solutions for Class 9 Biology Chapter 1 Fundamental Units of Life

Robert Hooke was the first person to prepare a microscope and see a cell. A cell is the basic fundamental unit of life. In this chapter, students will learn the structures and functions of different cells. Moreover, the effect of hypotonic, isotonic, and hypertonic solutions on a cell. Download NCERT Solutions for Fundamental Units of Life here.

NCERT Solutions for Class 9 Biology Chapter 2 Tissues

This chapter helps the students to learn about the various types of Tissues in Plants like Merismatic Tissue and Permanent tissue. Moreover, in the end, the chapter highlights topics like Position of plant tissues, a section of a stem, guard cells, etc. Download NCERT Solutions for Tissues here.

NCERT Solutions for Class 9 Biology Chapter 3 Diversity in Living Organisms

There are various life forms on this planet and it becomes very essential to study all of them. In chapter helps students to know about the various groups of organisms. Aristotle has done the classification of animals on the basis of land, air, and water, etc. There are certain terms related to the classification which the students will confront are Kingdom, Phylum, Class, Order, Family, Genus, Species, etc. Download NCERT Solutions for Diversity in Living Organisms here.

NCERT Solutions for Class 9 Biology Chapter 4 Why do we fall ill?

Health and Diseases are the two most important topics of discussion in this present world. This chapter highlights Health and its significance, reasons why do we fall ill, etc. Along with this, this chapter discusses the distinction between a healthy person and disease-free person. Download NCERT Solutions for Why do we fall ill here.

NCERT Solutions for Class 9 Biology Chapter 5 Natural Resources

This chapter highlights the most important element of life: Air. Starting with the role of the atmosphere in climatic control, this chapter deals with topics like how air moves, winds, rain, and air pollution. While discussing the topic of Air pollution, the chapter states various pollutants of the same. Moreover, in the end, the chapter, states various solutions to the problem. Download NCERT Solutions for Natural Resources here.

NCERT Solutions for Class 9 Biology Chapter 6 Improvement in Food Resources

This chapter deals with concepts like Crop Yield. Along with that, the chapter discusses the improvement in Crop Yield and related topics. Improvement in livestock and food crops are also discussed. The chapter also discusses topics like the ways to improve crop yield, crop production improvement, etc. Download NCERT Solutions for Improvement in Food Resources here.

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Solved Questions For You:

Question 1. A baby is not able to tell her/his caretakers that she/he is sick. What would help us to find out?

(a) That the baby is sick?
(b) What is the sickness?

Answer:

Baby is too small to complain of its own. During such cases, the following symptoms should be checked for, as these are the common symptoms seen when the baby is ill. They are:

(a) Increase in body temperature.

(b) Constant crying.

(d) Not eating food.

(e) Vomiting and diarrhoea.

Sickness is a condition used to refer to physical illness or disease.

Question 2. Under which of the following conditions is a person most likely to fall sick?

(a) When she is recovering from malaria.
(b) When she has recovered from malaria and is taking care of someone suffering from chicken-pox.
(c) When she is on a four-day fast after recovering from malaria and is taking care of someone suffering from chicken-pox. Why?

Answer: A person is more likely to fall sick when she is on a four-day fast after recovering from malaria and is taking care of someone suffering from chickenpox. This is because since she has suffered from malaria and is in the recovery phase, it means that she is still not completely diseases-free. Fasting affects the immune system as the body is deprived of essential nutrients required to maintain a healthy body. Chickenpox is a contagious disease, this also makes her susceptible to contracting the disease while taking care of a person suffering from chickenpox.

Question 3. A doctor/nurse/health-worker is exposed to more sick people than others in the community. Find out how she/he avoids getting sick herself/himself.

Answer: Medical personnel are constantly in contact with the sick and diseased people coming in the hospitals for the treatment. They follow various measures in order to prevent themselves from getting infected:

1. They avoid eating or sharing food with patients.

2. They are always in hospital scrubs to protect themselves in situations where there is spillage of blood or body fluids on them.

3. Hospital is always kept clean.

3. Use of sanitizers and disinfectants wherever required.

4. Use of gloves while attending a patient.

Question 4. Conduct a survey in your neighbourhood to find out what the three most common diseases are. Suggest three steps that could be taken by your local authorities to bring down the incidence of these diseases.

Answer: Common diseases are dysentery, viral fever and jaundice. Preventive measures are:

(a) Maintaining the neighbourhood clean, i.e., removal of garbage and storing it in covered place until it is disposed of.
(b) Filling up of the potholes and ditches, where water stagnates and creates a breeding place for mosquitoes.

(c) The timely spray of chemicals in the surroundings to kill mosquitoes.
(c) Provision of safe drinking water.
(d) Arrangement of social programmes to educate people about the prevention of diseases.

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