Selina solutions concise biology class 9 icse Solutions for Chapter 16 diseases cause and control

Amoebiasis is caused by the protozoan: (a) Amoeba proteus (b) Euglena (c) Plasmodium (d) Entamoeba

BCG vaccine provides immunity against: (a) Tetanus (b) Cholera (c) AIDS (d) Tuberculosis

The expanded forms of AIDS is: (a) Active Immunity Deficiency Syndrome (b) Acquired Immuno Deficiency Syndrome (c) Acquired Immuno Deficiency Status (d) Active Immuno Deficiency Syndrome

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

(a) Filiariasis 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 Filiariasis is caused by the bite of female anopheles mosquito T/F

Write the full form of AIDS.

(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 body’s defense 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 produce________ (h) The popular name of the disease Filiariasis ________

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

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

Name any four non-infectious diseases and their causes

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

Write very briefly about the following:

(a) BCG

(b) Incubation period

(c) Chicken pox

(d) Hepatitis A

What are the causes and symptoms of malaria, chickenpox, and tuberculosis? How can these diseases be prevented?