Q79. Explain nitrogen cycle.

 

Q80. What are the different methods of food preservation?

 

Q81. Complete the table.

Human Disease

Causative

Microorganism

Mode of Transmission

Preventive measures

Tuberculosis

 

 

 

Measles

 

 

Chicken Pox

 

 

Polio

 

 

 

Cholera

 

 

 

Typhoid

 

 

 

Hepatitis B

 

 

 

 

 

 

 

Malaria

 

 

 

 

Q82. Draw diagrams of Chlamydomonas, Spirogyra, Amoeba, Paramecium, Bread mould, Penicillium and Aspergillus.

 

Last modified: Friday, 19 July 2019, 12:18 PM