Biology
List 3 ways by which you should keep your environment clean.
Diseases
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Answer
Three ways to keep the environment clean are:
- Maintain a clean environment to prevent the spreading of diseases due to the breeding of mosquitoes, houseflies and pathogens.
- Garbage should be kept in covered bins so that flies do not breed on it.
- There should be proper sewer lines connected to sewage treatment plants.
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Related Questions
Given below is a crossword puzzle. Read the clues across and clues down, and fill up the blank squares. Check your performance with the correct solutions given at the end of the chapter.

Clues down
1. Germs or germ - substances introduced into the body to prevent occurrence of an infectious disease.
2. A disease caused by an infected dog that affects the central nervous system.
3. A disease in which the eyes, the skin and the urine turn yellow.
4. The disease pertussis is popularly known as whooping ……………
Clues across
1. Category of pathogen that causes diseases like common cold and mumps.
5. This is the vaccine for preventing tuberculosis.
6. An organ usually affected by tuberculosis.
7. Jumbled spelling of one of the most common insect which visits our exposed foods and contaminates them.
8. Cover this part of your body by a handkerchief while sneezing to prevent droplet infection to others.
9. These may readily grow in your hair, if you do not wash it regularly.
10. A disease that weakens body's defence system against infections.
Describe the ways in which communicable diseases are transmitted through various indirect methods.
Distinguish between Elephantiasis and Malaria on the basis of the mode of transmission.
Distinguish between Jaundice and Tuberculosis on the basis of the affected organs.