Science

Application: In India radar imaging are used for crop estimation because our main crop growing season of kharif is in May-September when it rains and gets cloudy. We have used this data extensively for forestry, soil, land use, geology and during floods and cyclone. Due to an all-weather seeing feature, the satellite becomes special for … Read more

DRDO has played a stellar role since its inception in 1958. Having established a sound ecosystem and supported by a large pool of committed manpower, we have today a proven competence to produce strategic and state-of-the-art tactical military hardware and related technologies, in diverse disciplines covering Aeronautics, Missiles, Naval Systems, Armament & Combat Engineering, Electronics, … Read more

Micropropagation Ans:  Method of producing thousands of plants through tissue culture is called micropropagation. Each of these plants will be genetically identical to the original plant from which they are grown. They are soma clones. Somatic hybridisation Ans:  In somatic hybridisation cell wall is removed by digesting it with enzyme like pectinase and cellulase. Isolated … Read more

Chikungunya is a viral disease (genus Alphavirus) which is transmitted to humans by infected mosquitoes – including Aedes aegypti and Aedes albopictus. The name chikungunya originates from a verb in the Kimakonde language, meaning ‘to become contorted’. This refers to the ‘stooped’ appearance of those suffering with joint pain. Symptoms Symptoms appear between 4 and 7 days after the … Read more

Convalescent plasma (kon-vuh-LES-unt PLAZ-muh) therapy is an experimental treatment that some doctors are using for people with severe coronavirus disease 2019 (COVID-19). No drug has been proved to be safe and effective for treating COVID-19. People who’ve recovered from COVID-19 have antibodies — proteins the body uses to fight off infections — to the disease in … Read more

  Ballistic Cruise Launched directly into the high layers of the earth’s atmosphere A cruise is a guided missile that can destroy a target over long distance with high accuracy. Follows parabolic path Does not follow parabolic path It depends on gravity hence called ballistic. Does not depend upon gravity Classified by coverage Classified by … Read more

Defluoridation is the downward adjustment of the level of fluoride in drinking water. Worldwide, fluoride is one of the most abundant anions present in groundwater. Fluoride is more present in groundwater than surface water mainly due to the leaching of minerals. Groundwater accounts for 98 percent of the earth’s potable water. An excess of fluoride … Read more

:  The polymerase chain reaction is a technique for cloning a particular piece or amplifying a single or few copies of a piece of DNA, generating millions or more copies of that particular DNA sequence. One can make virtually unlimited copies of a single DNA molecule even though it may initially be present in a … Read more

It is an advance technology of genetic engineering to rectify the abnormalities occurring in the mitochondria due to mutation. The mutation severely affects the functioning of mitochondria in the baby. As a result baby may suffer from disease like Alzheimer’s and Parkinson disease. In sexual reproduction, Mitochondrial DNA is obtained from exclusively from the mother. … Read more

Draw diagram Basis Mitosis Meiosis Number of divisions One Two – meiosis 1 and meiosis II DNA replication Occurs during interphase Occurs during interphase Role Production of somatic cells for growth of the body Produces gametes or gametogenesis Daughter cell produced Two diploid cells that are genetically identical to parent Four haploid cell(n) containing half … Read more