Tamil Nadu Board of Secondary EducationSSLC (English Medium) Class 9th
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Tamil Nadu Board Samacheer Kalvi solutions for Class 9th Science Answers Guide chapter 22 - World of Microbes [Latest edition]

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Class 9th Science Answers Guide - Shaalaa.com
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Chapter 22: World of Microbes

Exercise
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Exercise [Page 270]

Tamil Nadu Board Samacheer Kalvi solutions for Class 9th Science Answers Guide Chapter 22 World of MicrobesExercise [Page 270]

Choose the correct answer.

Exercise | Q I. 1. | Page 270

Which of the following is transmitted through air?

  • Tuberculosis

  • Meningitis

  • Typhoid

  • Cholera

Exercise | Q I. 2. | Page 270

One of the means of indirect transmission of a disease is ______.

  • sneezing

  • coughing

  • vectors

  • droplet infection

Exercise | Q I. 3. | Page 270

Diptheria affects the ______.

  • lungs

  • throat

  • blood

  • liver

Exercise | Q I. 4. | Page 270

The primary organ infected during tuberculosis is ______.

  • bone marrow

  • intestine

  • spleen

  • lungs

Exercise | Q I. 5. | Page 270

Microbes that generally enter the body through nose are likely to affect ______.

  • gut

  • lungs

  • liver

  • ymph nodes

Exercise | Q I. 6. | Page 270

The organ affected by jaundice is ______.

  • liver

  • lungs

  • kidney

  • brain

Exercise | Q I. 7. | Page 270

Poliomyelitis virus enters the body through ______.

  • skin

  • mouth and nose

  • ears

  • eye

Exercise [Page 271]

Tamil Nadu Board Samacheer Kalvi solutions for Class 9th Science Answers Guide Chapter 22 World of MicrobesExercise [Page 271]

Fill in the blanks.

Exercise | Q II. 1. | Page 271

______ break down organic matter and animal waste into ammonia.

Exercise | Q II. 2. | Page 271

Typhoid fever is caused by ______.

Exercise | Q II. 3. | Page 271

H1N1 virus causes ______.

Exercise | Q II. 4. | Page 271

______ is a vector of viral disease dengue.

Exercise | Q II. 5. | Page 271

______ vaccine gives considerable protection against tuberculosis.

Exercise | Q II. 6. | Page 271

Cholera is caused by ______ and malaria is caused by ______.

Exercise [Page 271]

Tamil Nadu Board Samacheer Kalvi solutions for Class 9th Science Answers Guide Chapter 22 World of MicrobesExercise [Page 271]

Exercise | Q III. 1. | Page 271

Expand the following.

ORS- 

Exercise | Q III. 2. | Page 271

Expand the following.

HIV- 

Exercise | Q III. 3. | Page 271

Expand the following.

DPT- 

Exercise | Q III. 4. | Page 271

Expand the following.

WHO- 

Exercise | Q III. 5. | Page 271

Expand the following.

BCG- 

Exercise [Page 271]

Tamil Nadu Board Samacheer Kalvi solutions for Class 9th Science Answers Guide Chapter 22 World of MicrobesExercise [Page 271]

Exercise | Q IV. i). | Page 271

Pick out the odd one.

  • AIDS

  • Retrovirus

  • Lymphocytes

  • BCG

Exercise | Q IV. ii). | Page 271

Pick out the odd one.

  • Bacterial disease

  • Rabies

  • Cholera

  • Common cold and Influenza

Exercise [Page 271]

Tamil Nadu Board Samacheer Kalvi solutions for Class 9th Science Answers Guide Chapter 22 World of MicrobesExercise [Page 271]

Exercise | Q V. 1. | Page 271

State whether true or false. If false, correct the statement.

Rhizobium, associated with root nodules of leguminous plants fixes atmospheric nitrogen.

  • True

  • False

Exercise | Q V. 2. | Page 271

State whether true or false. If false, correct the statement.

Non- infectious diseases remain confined to the person who develops the disease and do not spread to others.

  • True

  • False

Exercise | Q V. 3. | Page 271

State whether true or false. If false, correct the statement.

The process of vaccination was developed by Jenner.

  • True

  • False

Exercise | Q V. 4. | Page 271

State whether true or false. If false, correct the statement.

Hepatitis B is more dangerous than Hepatitis A.

  • True

  • False

Exercise [Page 271]

Tamil Nadu Board Samacheer Kalvi solutions for Class 9th Science Answers Guide Chapter 22 World of MicrobesExercise [Page 271]

Exercise | Q VI. | Page 271

Match the following

Swine flu Human Papilloma virus
Genital warts Human Immunodeficiency Virus
AIDS Mycobacterium
Tuberculosis Influeuza virus H1N1
Exercise [Page 271]

Tamil Nadu Board Samacheer Kalvi solutions for Class 9th Science Answers Guide Chapter 22 World of MicrobesExercise [Page 271]

Exercise | Q VII. 1. | Page 271

Define the following.

Pathogen

Exercise | Q VII. 2. | Page 271

Define the following.

Bacteriophages

Exercise | Q VII. 3. | Page 271

Define the following.

Vaccines

Exercise | Q VII. 4. | Page 271

Define the following.

Prions

Exercise [Page 271]

Tamil Nadu Board Samacheer Kalvi solutions for Class 9th Science Answers Guide Chapter 22 World of MicrobesExercise [Page 271]

Answer very briefly.

Exercise | Q VIII. 1. | Page 271

Distinguish between Virion and Viroid.

Exercise | Q VIII. 2. | Page 271

Name the vector of the malarial parasite. Mention the species of malarial parasite which cause malignant and fatal malaria.

Exercise | Q VIII. 3. | Page 271

What is triple antigen? Mention the disease which can be prevented by using the antigen.

Exercise | Q VIII. 4. | Page 271

Name the chronic diseases associated with respiratory system.

Exercise | Q VIII. 5. | Page 271

Name the organism causing diarrhoeal disease and give one precaution against it.

Exercise | Q VIII. 6. | Page 271

Name two common mosquitoes and the diseases they transmit.

Exercise [Page 271]

Tamil Nadu Board Samacheer Kalvi solutions for Class 9th Science Answers Guide Chapter 22 World of MicrobesExercise [Page 271]

Answer briefly.

Exercise | Q IX. 1. | Page 271

Give an account of classification of bacteria based on the shape.

Exercise | Q IX. 2. | Page 271

Describe the role of microbes in agriculture and industries.

Exercise | Q IX. 3. | Page 271

Explain the various types of viruses with examples.

Exercise | Q IX. 4. | Page 271

Suggest the immunization schedule for a new born baby till 12 months of age. Why it is necessary to follow the schedule?

Exercise [Page 271]

Tamil Nadu Board Samacheer Kalvi solutions for Class 9th Science Answers Guide Chapter 22 World of MicrobesExercise [Page 271]

Assertion and reason type questions.

Exercise | Q X. 1. | Page 271

Assertion: Chicken pox is a disease indicated by scars and marks in the body.

Reason: Chicken pox causes rashes on face and further spreads throughout the body.

  • If both A and R are true and R is correct explanation of A.

  • If both A and R are true but R is not the correct explanation of A.

  • If A is true but R is false.

  • If both A and R are false.

Exercise | Q X. 2. | Page 271

Assertion: Dengue can be treated by intake of antibiotics.

Reason: Antibiotics blocks the multiplication of viruses.

  • If both A and R are true and R is correct explanation of A.

  • If both A and R are true but R is not the correct explanation of A.

  • If A is true but R is false.

  • If both A and R are false.

Exercise [Page 272]

Tamil Nadu Board Samacheer Kalvi solutions for Class 9th Science Answers Guide Chapter 22 World of MicrobesExercise [Page 272]

Exercise | Q XI. 1. | Page 272

Higher Order Thinking Skill.

Suggest precautionary measures you can take in your school to reduce the incidence of infectious disease.

Exercise | Q XI. 2. | Page 272

Higher Order Thinking Skill.

Tejas suffered from typhoid while, Sachin suffered from tuberculosis. Which disease could have caused more damage and why?

Chapter 22: World of Microbes

Exercise
Class 9th Science Answers Guide - Shaalaa.com

Tamil Nadu Board Samacheer Kalvi solutions for Class 9th Science Answers Guide chapter 22 - World of Microbes

Tamil Nadu Board Samacheer Kalvi solutions for Class 9th Science Answers Guide chapter 22 (World of Microbes) include all questions with solution and detail explanation. This will clear students doubts about any question and improve application skills while preparing for board exams. The detailed, step-by-step solutions will help you understand the concepts better and clear your confusions, if any. Shaalaa.com has the Tamil Nadu Board of Secondary Education Class 9th Science Answers Guide solutions in a manner that help students grasp basic concepts better and faster.

Further, we at Shaalaa.com provide such solutions so that students can prepare for written exams. Tamil Nadu Board Samacheer Kalvi textbook solutions can be a core help for self-study and acts as a perfect self-help guidance for students.

Concepts covered in Class 9th Science Answers Guide chapter 22 World of Microbes are Microorganisms (Microbes) and Microbiology, Bacteria, Airborne Diseases Caused by Bacteria, Airborne Diseases Caused by Virus, Uses of Microorganisms (Microbes), Virus, Fungi, Prions, Disease, Categories of Disease, Vector Borne Diseases, Harmful Effects of Microorganisms (Microbes), Contamination of Water and Water Borne Diseases, Waterborne Diseases Caused by Virus, Waterborne Diseases Caused by Bacteria, Airborne Diseases, Diseases Caused by Protozoa, Diseases Transmitted by Animals, Vaccination and Immunization, Sexually Transmitted Diseases (STD), Manifestation of Diseases, Diseases Caused by Parasitic Worms.

Using Tamil Nadu Board Samacheer Kalvi Class 9th solutions World of Microbes exercise by students are an easy way to prepare for the exams, as they involve solutions arranged chapter-wise also page wise. The questions involved in Tamil Nadu Board Samacheer Kalvi Solutions are important questions that can be asked in the final exam. Maximum students of Tamil Nadu Board of Secondary Education Class 9th prefer Tamil Nadu Board Samacheer Kalvi Textbook Solutions to score more in exam.

Get the free view of chapter 22 World of Microbes Class 9th extra questions for Class 9th Science Answers Guide and can use Shaalaa.com to keep it handy for your exam preparation

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