SCIENCE TECH

  What is mutation? Sudden heritable change in genetic material of an organism is called as mutation. Mutation are source of discontinuous variation. Mutation was first observed by Seth Wright. Frequency of mutation at present is 1×10^(-6) (1cell in : 1 million - cell). But it will increase in future due to pollution and destruction of ozone layer.  Mutation in     Corona virus  -                  Mutation in corona virus is slow . Compared with HIV , SARS - COV - 2 is changing much more slowly . After Saver Acute Respiratory Syndrome (SARS) virus began circulating in humans ,for instance,it developed a kind of mutation called a deletion that might have showed its spread.  Causes of mutation - • Mutation can be caused by exposure to specific chemicals or radiation. • alfa , beta , gamma and X  - rays can also causes mutation . • Che mical mutation are more harmful than radiation because body is not prot...

CORONA VIRUS    Corona virus disease (COVID -19) is an infectious disease caused by a newly discovered coronavirus. Most of the people infected with the COVID -19 virus will experience mild to moderate respiratory illness and recover without requiring special treatment. Older people, and those with underlying medical problems like cardiovascular disease , diabetes, chronic respiratory disease and cancer are likely to develop serious illness. How does corona virus spread?  Expert believe the virus that causes COVID-19 spreads mainly from person to person . Droplet or aerosols- when an infected person coughs, sneezes or talks droplet or tiny particles called aerosols carry the virus into air from their nose or mouth.  Airborne transmission- research shows that the virus can live in the air for up to 3 hours. It can get into your lungs if someone who had it breaths out and you breath that air in. Surface transmission- when you touch surfaces that someone who has the vir...