IMPORTANT DATES OF
NCERT BIOLOGY
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
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
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
IMPORTANT DATES OF
NCERT BIOLOGY
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.
IMPORTANT DATES OF
NCERT BIOLOGY
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
W
- Ministry of Environment amd
Forest.
OR
1986 - Environment Act (NEPA)
1987 - Noise included in air pollution
LD- 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.
