08/10/2021
IMP years in ncert :-
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 s*x 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 ---> โข Hugo de Vries
โข Karl Corrence
โข 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 โ 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