Long Answer Type Questions
66. What is meant by communicable diseases Name any two communicable diseases
What are the various ways in which communicable diseases can occur and spread ?
7) Name any five human diseases caused by microorganisms. Also name the causative micro-organisms
and mode of transmission for each of these disenes.
() State the various ways of preventing the occurrence and spreading of communicable diseases
as (a) What is a vaccine ? How does a vaccine work ?
Why are children given vaccination
69. What is meant by nitrogen fixation State two ways in which nitrogen gas of the atmosphere can be
fixed in nature to get nitrogen compounds in the soil
70. Draw a neut labelled diagram of nitrogen cycle in nature. Which natural phenomenon occurring in the
sky is responsible for nitrogen fixation
Answers
Answer:
A communicable disease is one that is spread from one person to another through a variety of ways that include: contact with blood and bodily fluids; breathing in an airborne virus; or by being bitten by an insect.
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Microbial diversity is truly staggering, yet all these microbes can be grouped into five major types: Viruses, Bacteria, Archaea, Fungi, and Protists.
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Learn, practice, and teach healthy habits.
#1 Handle & Prepare Food Safely. Food can carry germs. ...
#2 Wash Hands Often. ...
#3 Clean & Disinfect Commonly Used Surfaces. ...
#4 Cough and Sneeze into a Tissue or Your Sleeve. ...
#5 Don't Share Personal Items. ...
#6 Get Vaccinated. ...
#7 Avoid Touching Wild Animals. ...
#8 Stay Home When Sick.
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When a disease-carrying microbe enters our body, the body produces antibodies to fight the invader. The body also remembers how to fight the microbe if it enters again. So, if dead or weakened microbes are introduced into a healthy body, the body fights and kills them by producing suitable antibodies. The antibodies remain in the body and we are protected from the disease-causing microbes. This is how a vaccine works. Several diseases, including cholera, tuberculosis, smallpox and hepatitis can be prevented by vaccination. In your childhood, you must have been given injections to protect yourself against several diseases. It is essential to protect all children against these diseases. Necessary vaccines are available in the nearby hospitals. You might have seen the advertisement on T.V. and newspapers regarding protection of children against polio under Pulse Polio Program. Polio drops given to children are actually a vaccine. A worldwide campaign against smallpox has finally led to its eradication from most parts of the world. These days vaccines are made on a large scale from microorganisms to protect humans and other animals from several diseases.
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The conversion of atmospheric nitrogen into a combined form such as ammonia through chemical and especially biological action such as that of rhizobium .
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Lightning is a natural phenomenon which occurs in the sky and responsible for nitrogen fixation. The temperature and pressure during lightning convert atmospheric nitrogen into oxides of nitrogen.( see the attachment too for complete answer...)...!!
hope it helps..!!!!
