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Chapters
2: Motion
3: Fluids
4: Electric charge and Electric current
5: Magnetism and Electromagnetism
6: Light
7: Heat
8: Sound
9: Universe
10: Matter Around Us
11: Atomic Structure
12: Periodic Classification of Elements
13: Chemical Bonding
14: Acids, Bases and Salts
15: Carbon and its Compounds
16: Applied Chemistry
17: Animal Kingdom
18: Organisation of Tissues
19: Plant Physiology
20: Organ Systems in Animals
21: Nutrition and Health
▶ 22: World of Microbes
23: Economic Biology
24: Environmental Science
25: Computer – LibreOffice Impress
![Samacheer Kalvi solutions for Science [English] Class 9 TN Board chapter 22 - World of Microbes - Shaalaa.com](/images/science-english-class-9-tn-board_6:5f2b1b2038084cf381bfa42c826a928c.jpg "Samacheer Kalvi solutions for Science [English] Class 9 TN Board chapter 22 - World of Microbes")
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Solutions for Chapter 22: World of Microbes
Below listed, you can find solutions for Chapter 22 of Tamil Nadu Board of Secondary Education Samacheer Kalvi for Science [English] Class 9 TN Board.
Samacheer Kalvi solutions for Science [English] Class 9 TN Board 22 World of Microbes Exercise [Pages 270 - 272]
Choose the correct answer.
Which of the following is transmitted through air?
Tuberculosis
Meningitis
Typhoid
Cholera
One of the means of indirect transmission of a disease is ______.
sneezing
coughing
vectors
droplet infection
Diptheria affects the ______.
lungs
throat
blood
liver
The primary organ infected during tuberculosis is ______.
bone marrow
intestine
spleen
lungs
Microbes that generally enter the body through nose are likely to affect ______.
gut
lungs
liver
ymph nodes
The organ affected by jaundice is ______.
liver
lungs
kidney
brain
Poliomyelitis virus enters the body through ______.
skin
mouth and nose
ears
eye
Fill in the blanks.
______ break down organic matter and animal waste into ammonia.
Typhoid fever is caused by ______.
H1N1 virus causes ______.
______ is a vector of viral disease dengue.
______ vaccine gives considerable protection against tuberculosis.
Cholera is caused by ______ and malaria is caused by ______.
Expand the following.
ORS-
Expand the following.
HIV-
Expand the following.
DPT-
Expand the following.
WHO-
Expand the following.
BCG-
Pick out the odd one.
AIDS
Retrovirus
Lymphocytes
BCG
Pick out the odd one.
Bacterial disease
Rabies
Cholera
Common cold and Influenza
State whether true or false. If false, correct the statement.
Rhizobium, associated with root nodules of leguminous plants fixes atmospheric nitrogen.
True
False
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
State whether true or false. If false, correct the statement.
The process of vaccination was developed by Jenner.
True
False
State whether true or false. If false, correct the statement.
Hepatitis B is more dangerous than Hepatitis A.
True
False
Match the following
| Swine flu | Human Papilloma virus |
| Genital warts | Human Immunodeficiency Virus |
| AIDS | Mycobacterium |
| Tuberculosis | Influeuza virus H1N1 |
Define the following.
Pathogen
Define the following.
Bacteriophages
Define the following.
Vaccines
Define the following.
Prions
Answer very briefly.
Distinguish between Virion and Viroid.
Name the vector of the malarial parasite. Mention the species of malarial parasite which cause malignant and fatal malaria.
What is triple antigen? Mention the disease which can be prevented by using the antigen.
Name the chronic diseases associated with respiratory system.
Name the organism causing diarrhoeal disease and give one precaution against it.
Name two common mosquitoes and the diseases they transmit.
Answer briefly.
Give an account of classification of bacteria based on the shape.
Describe the role of microbes in agriculture and industries.
Explain the various types of viruses with examples.
Suggest the immunization schedule for a new born baby till 12 months of age. Why it is necessary to follow the schedule?
Assertion and reason type questions.
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.
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.
Higher Order Thinking Skill.
Suggest precautionary measures you can take in your school to reduce the incidence of infectious disease.
Higher Order Thinking Skill.
Tejas suffered from typhoid while, Sachin suffered from tuberculosis. Which disease could have caused more damage and why?
Solutions for 22: World of Microbes
Samacheer Kalvi solutions for Science [English] Class 9 TN Board chapter 22 - World of Microbes
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Concepts covered in Science [English] Class 9 TN Board chapter 22 World of Microbes are Categories of Disease, Harmful Microorganisms, Airborne Diseases, Airborne Diseases Caused by Virus, Airborne Diseases Caused by Bacteria, Contamination of Water and Water Borne Diseases, Waterborne Diseases Caused by Virus, Waterborne Diseases Caused by Bacteria, Vector Borne Diseases, Microorganisms (Microbes) and Microbiology, Bacteria, Viruses, Fungi, Prions, Useful micro-organisms, Disease, Sexually Transmitted Diseases (STD), Protozoan Diseases, Diseases Transmitted by Animals, Vaccination and Immunization, Manifestation of Diseases, Helminthic Diseases.
Using Samacheer Kalvi Science [English] Class 9 TN Board solutions World of Microbes exercise by students is an easy way to prepare for the exams, as they involve solutions arranged chapter-wise and also page-wise. The questions involved in Samacheer Kalvi Solutions are essential questions that can be asked in the final exam. Maximum Tamil Nadu Board of Secondary Education Science [English] Class 9 TN Board students prefer Samacheer Kalvi Textbook Solutions to score more in exams.
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