2022-06-07 05:50:01
IMPORTANT YEARS FOR NEET 2022
1731 - Many people of Bishnoi community sacrifice their lives saving trees (Jodhpur)
1770 - Priestley's experiment by Bell Jar, Mice & Mint plant, Candle.
1774 - Discovery of oxygen by Joseph Priestley
1838 - Matthias Schleiden-Cell Theory
1829 - Theodore Schwann- Cell Theory
1850s - Before industrialization => more white wing Moth
1854 - Julius von Sachs proved that glucose is formed in photosynthesis & stored as starch.
1855 - "Omnis cellula cellula" by Rudolf Virchow & complete the cell theory.
1856 - 1863 Mendel work on garden pea.
1860 - Hydroponics technique developed by Julie Von Sache
s.
1865 - Mendel publishes his work
on inheritance of character
1866 - Down's Syndrome discovered by Langdon Down.
1869 - DNA as a acidic substance was 1st identified by Friedrich Meischer & termed a "Nuclein"
1891 - Fossils of Java man discovered in Java
- Henking discovered X-body (X-chromosome) in insect. (XO- type sex determination)
1892 - Discovery of TMV by D.J. Ivanowsky
1898 - M.W. Beijerinck demonstrated infectious nature of TMV
- Discovery of Golgi Body by Camillo Golgi.
1900 - Rediscovery of Mendel's work by ---> • Hugo de Vries
• Karl Corrence
• Tschemark
1902 - Chromosomal theory of inheritance given by Sutton & Bovery.
1905 - Law of limiting factors for plants given by Blackmann
1920 - After Industrialisation => more black moth
1928 - Frederick Griffith's Transformation experiment on Streptococcus pneumonia bacteria
1933 – 1944 - Avery, Macleod McCarty used transformation principle of Griffith's experiment & concluded that DNA is genetic material.
1938 - Coelacanth/Lobe Fines caught in South Africa ---> Ancestor of amphibia.
1947 - At the time of our independence India's population, was approximately
350 million .
1950s - Electron microscope invention
- Tissue culture started
1951 - Family planning was initiated
1952 - Hershey & Chase experiment more correctly proved that DNA ie genetic material [ #unquivocal\proof ]
1953 - Discovery of ribosome by George Palade.
- S.L Miller Experiment of evolution.
- Double helical structure model of DNA given by Watson & Crick.
1958 - Matthew Meselson of Franklin Stahl experiment (E. coli in NH4CI medium) proved that DNA replication is semiconservative )
- Taylor study on vicia faba plant (used radioactive thymidind and proved semiconservative nature of DNA)
1960s - Green Revolution.
1963 - Restriction endonuclease isolated from E. coli.
1963 - Wheat varieties Sonalika f Kalyan Sona (High yield & Disease resistant ) introduced in INDIA.
1966 - Derived semi dwarf varieties of rice introduced in India.
1969 - R.H. Whittaker proposed FIVE-KINGDOM Classification
1971 - Discovery of viroids by T.O. Diener
- Govt. of India legalised MTP.
1972 - Fluid Mosaic model of plasma membrane by Singer & Nicolson
- 1st recombinant DNA developed by Stanley Cohen and Herbert Boyer
- National committee for environmental planning and Coordination was established.
- Wild life protection act in India.
1974 - Water Act. & also Chipko movement
1980s - Joint Forest movement
1981 - Air act.
- AIDS was fired reported
- Intrinsic growth rate of India (r= 0.0205)
1983 - Eli Lilly American company human Insulin from E. coli.
1984 - Bhopal Tragedy
- Ministry of Environment amd Forest.
1986 - Environment Act (NEPA)
1987 - Noise included in air pollution
- Montreal protocol (Canada)
1988 - National Forest Policy
1989 - Montreal Protocol became effective.
1990s - Delhi ranked 4th among 41 most polluted cities.
1990 - First clinical gene therapy was given to 14 yr old girl with ADA deficiency eye.
- Human Genome Project (HGP) launched
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