Important Years in biology for NEET [PDF] - 7tricks

important Years in biology all in one

IMPORTANT YEARS IN NCERT:-

1731 - Many people of the 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 
1850 -  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 the inheritance of character 
1866 - Down's Syndrome discovered by Langdon Down.
1869 - DNA as an 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 insects. (XO- type sex determination)
1892 - Discovery of TMV by D.J. Ivanowsky
1898 -  M.W. Beijerinck demonstrated the infectious nature of TMV
          - Discovery of Golgi Body by Camillo Golgi.
1900 - Rediscovery of Mendel's work by ---> • Hugo de Vries
           • Karl Currency
           • Tschemark
1902 - Chromosomal theory of inheritance given by Sutton & Bovery.
1905 - Law of limiting factors for plants given by Blackman
1920 - After Industrialisation => more black moth
1928 - Frederick Griffith's Transformation  experiment on Streptococcus pneumonia bacteria
1933 – 1944 - Avery, Macleod McCarty used the transformation principle of Griffith's experiment & concluded that DNA is the 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.
1950 -  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 the 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 thymidine and proved  semiconservative nature of DNA)
1960 -  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 the plasma membrane by Singer & Nicolson 
          - 1st recombinant DNA developed by Stanley Cohen and Herbert Boyer
          - National Committee for environmental planning and Coordination was established.
          - Wildlife protection act in India.
1974 -  Water Act.  &  also Chipko movement
1980 -  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 and Forest.
1986 - Environment Act (NEPA)
1987 - Noise included in air pollution   
          - Montreal protocol (Canada)
1988 - National Forest Policy
1989 -  Montreal Protocol became effective.
1990 -  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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