Diseases Cause and Control Concise ICSE Class-9 Selina Solutions

Chapter-16 Diseases: Cause and Control Concise Biology Selina Publications

Diseases Cause and Control Concise ICSE Class-9 Biology Selina Solutions Chapter-16 . We Provide Step by Step Answer of Progress Check , MCQs, Very Short Answer Type, Short Answer Type, Long Answer Type and Structured / Applications / Skill Type Questions of Exercise-16 Hygiene A Key To Healthy Life. Visit official Website  CISCE  for detail information about ICSE Board Class-9

Diseases Cause and Control Concise ICSE Class-9 Biology Selina Solutions Chapter-16


–: Select Topics :–

Progress Check (page-157),

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A.MULTIPLE CHOICE TYPE,

B.VERY SHORT ANSWER TYPE,

C.SHORT ANSWER TYPE,

D.LONG ANSWER TYPE

Note :-  Before Viewing Concise Solutions of Chapter-16 Diseases Cause and Control . Read the whole chapter carefully with figure. Focus on brief introduction to communicable Diseases, non communicable Diseases ,endemic , pandemic and sporadic diseases , Modes of transmission. Meaning of each Diseases of the above with example:

  • Bacterial Diseases :- cholera, typhoid, tuberculosis
  • Viral Diseases :- AIDS, chicken pox , hepatitis
  • Protozoan Diseases :- Malaria ,amoebic dysentery, sleeping sickness .
  • Helminthic Diseases : -Ascariasis , taeniasis , filiariasis.

 (Symptoms and measure to control the above disease )


Progress Check (page-157), Diseases Cause and Control Selina Solutions Chapter-16 ICSE Biology

Answer 1

progress check Chapter-16 Diseases Selina Biology Solutions

Question 2

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Classify…………….attack.

(i) Communicable……..

(ii) Non Communicable…..

Answer 2

(i) Communicable⇒ Cholera, Malaria, Plague.

(ii) Non Communicable⇒ Beri-beri, Colour blindness,Diabetes.


Review Question

A. MULTIPLE CHOICE TYPE  Chapter 16- Diseases: Cause And Control  Concise Biology Solutions

Question 1

A disease widely spread worldwide is known as

(a) endemic

(b) epidemic

(c) pandemic

(d) sporadic

Answer 1

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(c) pandemic

Question 2

The letter B in the name BCG vaccination stands for

(a) Brief

(b) Beri-beri

(c) Bacteria

(d) Bacillus

Answer 2

(d) Bacillus

Question 3

Use of disposable syringes for injecting medicines, etc. is specially advised to prevent

(a) Poliomyelitis

(b) Mumps

(c) Rabies

(d) AIDS

Answer 3

(d) AIDS

Question 4

The vector that transmits the malarial pathogen is:

(a) Culex mosquito

(b) Housefly

(c) Anopheles mosquito

(d) Entamoeba

Answer 4

(c) Anopheles mosquito

Question 5

Amoebiasis is caused by the protozoan:

(a) Amoeba proteus

(b) Euglena

(c) Plasmodium

(d) Entamoeba

Answer 5

(d) Entamoeba

Question 6

BCG vaccine provides immunity against

(a) Tetanus

(b) Cholera

(c) AIDS

(d) Tuberculosis

Answer 6

(d) Tuberculosis

Question 7

The expanded form of AIDS is

(a) Active Immunity Deficiency Syndrome

(b) Acquired Immuno Deficiency Syndrome

(c) Acquired Immuno Deficiency Status

(d) Active Immuno Deficiency Syndrome

Answer 7

(b) Acquired Immuno Deficiency Syndrome


Chapter 16- Diseases: Cause And Control  Concise Biology Solutions B. VERY SHORT ANSWER TYPE

Question 1

Mention whether the following statements are true (T) or false (F).

(a) Filariasis is transmitted by the housefly. T/F

(b) Malaria is caused by a protozoan. T/F

(c) BCG vaccine is used for chicken pox. T/F

(d) Louis Pasteur discovered a cure for malaria. T/F

(e) AIDS is caused by a bacterium. T/F

(f) HIV is a serious disease, usually fatal. T/F

(g) AIDS is not transmitted by contact with a patient’s clothes. T/F

(h) Chicken pox and hepatitis are bacterial diseases. T/F

(i) Goitre is endemic in sub-Himalayan regions of India. T/F

(j) AIDS is caused by a fungus. T/F

(k) Hay fever and asthma are allergies. T/F

(l) Smallpox still occurs in India. T/F

(m) The disease filariasis is caused by the bite of the female anopheles mosquito.

Answer 1

(a) F (False). Filariasis is transmitted by the Culex mosquito.

(b) T (True)

(c) F (False). BCG vaccine is used for tuberculosis.

(d) F (False). Louis Pasteur discovered a cure for rabies.

(e) F (False). AIDS is caused by a virus.

(f) T (True)

(g) T (True)

(h) F (False). Chicken pox and hepatitis are viral diseases.

(i) T (True)

(j) F (False). AIDS is caused by HIV virus.

(k) T (True)

(l) F (False). Smallpox has been eradicated from India.

(m) F (False). The disease filariasis is caused by the filarial worm Wuchereria bancrofti.

Question 2

Write the full form of AIDS.

Answer 2

AIDS : Acquired Immuno deficiency Syndrome

Question 3

Name the following:

(a) Category of pathogen that causes diseases like common cold and mumps.

(b) The vaccine for preventing tuberculosis.

(c) An organ usually affected by tuberculosis.

(d) A disease that weakens the body’s defence system against infections.

(e) Germ of germ-substance introduced into the body to prevent occurrence of an infectious disease.

(f) The vector responsible for transmission of sleeping sickness.

(g) The microorganism that requires a host to reproduce.

(h) The popular name of the disease filariasis.

Answer 3

(a) Viruses

(b) BCG

(c) Lungs

(d) AIDS

(e) Vaccine

(f) Tsetse fly

(g) Virus

(h) Elephantiasis


Selina Concise Solutions for ICSE Biology Chapter-16 Disease Cause and Countrol C. SHORT ANSWER TYPE 

Question 1

Define the terms infection, pathogen, incubation period and allergen.

Answer 1

Infection: The transmission of disease from one person to another is called infection.

Pathogen: Disease-causing micro-organism is called a pathogen.

Incubation period: Incubation period is the period between the entry of germs and the appearance of the first symptoms of the disease.

Allergen: An antigenic substance capable of producing immediate hypersensitivity allergy is called an allergen.

Question 2

What are the different ways in which infectious diseases can spread?

Answer 2

The different ways in which infectious diseases can spread are as follows:

Direct contact: Person to person, animal to person and expected mother to child

Indirect contact: Doorknob, phone, etc.

Droplet transmission: Sneezing, coughing, etc.

Particle transmission: Air particles can transfer infectious diseases

Bites and Stings: Mosquitoes, lice, ticks, etc.

Food Contamination: Food, beverages, etc.

Question 3

Name any four non-infectious diseases and their causes.

Answer 3

NON
INFECTIOUS
DISEASES
CAUSE
OF THE
DISEASE
Asthma Allergy
Cataract Ageing
Beri-Beri Nutritional
deficiency
Cancer Carcinogens
like chemicals,
tobacco
smoking,
pollution
etc.

 

Question 4

Why is it important to know how the germs leave the body of a patient?

Answer 4

It is important to know how the germs leave the body of a patient as there are some diseases and infections which are transmitted through air, water or just by direct contact. Therefore, to take precautions and protect others from further infections, it is a must to know how the germs leave the body of an infected person.

Question 5

Name the causative germ of AIDS. How is this disease transmitted?

Answer 5

Causative germ of AIDS:

HIV (Human immunodeficiency virus)

Transmission of AIDS:

(a) Sexual intercourse

(b) Mother to child transmission

(c) Contaminated blood transfusions


D. LONG ANSWER TYPE Diseases Cause and Control Selina Solutions Chapter-16 ICSE Biology

Question 1

Write very briefly about the following:

(a) BCG

(b) Incubation period

(c) Chicken pox

(d) Hepatitis A

Answer 1

(a) BCG:

It is a vaccine which is effective against the bacterial disease tuberculosis (TB). It develops immunity to TB. BCG stands for Bacillus Calmette Guerin.

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