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Class 10 Notes

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Class 10 Notes

May 11, 2026, 08:12 PM

🌟 Important Points of NCERT 🌟

1770 : Joseph Priestley - Essential role of air in growth of green plant.
1774 : Joseph Priestley - Discovered O2.

1831 : Robert Brown - Ist discovered and described nucleus.

1838 : Schleiden (German Botanist) - Work on plants.
1839 : Schwann(British Zoologist) - Work on both plants & animals.

1855 : Rudolf Virchow - Omnis cellula-e-cellula (cells arises from
pre-existing cells).

Life originate from pre-existing life : Pasteur (Yeast).

Life originate from non-living (decaying & rotting matter) : Spontaneous
generation.

Life originate from pre-existing non-living organic molecules (RNA,
Protein)- Oparin (Russia) & Haldane (England)- Chemical Evolution.

  : Mendal experiment on garden pea. (7 years)
1860 : Julius von Sachs - Developed hydroponics.

1865 : Mendal published his work.

1866 : Langdon Down - Down’s syndrome.

1869 : Friedrich Meischer - Ist identified DNA and named it nuclein.

1891 : Henking - Discovered X-body.

1891 : Fossil discovered in Java - Homo erectus.

1892 : Ivanowsky - Discovered virus.

1898 : Beijerinek - Contagium vivum fluidum (infectious living fluid).

1898 : Camillo Golgi - Discovered (observed) G. B.

1900 : de Vries, Corre ns and von Tsche rmak inde pende ntly
rediscovered Mendel’s results.

1902 : Chromosome movement during meiosis has been worked out.

1905 : Law of limiting factor (Blackmann).

1928 : Fredrick Griffith - Transforming experiment with Streptococcus
pneumoniae (Diplococcus).

1935 : Stanley - Crystallised viruses.

1937 : Ramde o Misra obtained Ph. D. in Ecology from Lee ds
university (U. K.).

1938 : Coelocanth fish caught in South Africa.

1945 : Fleming, Chain & Florey - Awarded Nobel prize.

1950 : Watson obtained Ph. D. on a study of the effect of hard X-rays
on bacteriophage multiplication.

1951 : Family planning programme started in India.

1952 : Hershey & Chase-experiment on bacteriophage or Bacterial virus
gives unequivocal proof that DNA is the genetic material.

1953 : Miller experiment - Methane, ammonia, hydrogen & water
vapour.

1953 : Watson & Crick - Double helical structure of B-DNA &
replication scheme.

1953 : Palade : Discovered ribosome.

1954 : Ramachandran - Triple helical model of collagen, published
in Nature.

1954 : Crick complete d Ph. D. on a thesis “X-rays diffraction :
polypeptides and proteins.

1958 : Meselson & Stahl - Work on E.coli proves semiconservative
replication of DNA in prokaryotes.

1958 : Taylor - Work on Vicia faba proves semiconservative replication
of DNA in eukaryotes.

1960 : Katherine Esau - Published “Anatomy of Seed Plants.”

1961 : Melvin Calvin - Nobel Prize.

1962 : Watson, Crick and Wilikins - Nobel Prize.

1963 : Wheat varieties (Sonalika & Kalyan sona) introduced.

1963 : Two enzyme responsible for restricting growth of bacteriophage
in E.coli were isolated.

1966 : Derivative of IR-8 & Taichung native-I introduced.

1969 : Whittaker - Five kingdom classification.

1971 : Govt. of India legalized MTP.

1971 : Diener- Discovered Viroid(free RNA without capsid).

1972 : Singer & Nicolson - Fluid mosaic model.

1972 : Stanley Cohen & Herbert Boyer - Formed Ist recombinant DNA.

1972 : Establishme nt of NCEPC - National Committe e for
Environmental Planning & Coordination.

1974 : Water act.

1980 : Joint forest management, (JFM).

1981 : AIDS was Ist reported.

1981 : Air act.

1983 : Eli Lily (An American company) produces insulin in E.coli by
recombinant DNA technology.

1984 : Establishment of MOEF : Ministry of Environment & Forest.

1986 : Environment Protection Act.

1987 : Montreal protocol. Held in Montreal, Canada.

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Class 10 Notes

May 11, 2026, 08:12 PM

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Class 10 Notes

May 11, 2026, 08:12 PM

⭐️ CBSC Complete 11th + 12th Study Material Package in one post ⭐️
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Class 10 Notes

May 11, 2026, 08:12 PM

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Class 10 Notes

May 11, 2026, 08:12 PM

Chemistry Class 12 Revision Notes

◻️ Revision 1. Solid State Notes
https://t.me/CBSE_Class_11_12th_Science_Notes

◻️ Revision 2. Solutions Notes
https://t.me/CBSE_Class_11_12th_Science_Notes

◻️ Revision 3. Electrochemistry Notes
https://t.me/CBSE_Class_11_12th_Science_Notes

◻️ Revision 4. Chemical Kinetics Notes
https://t.me/CBSE_Class_11_12th_Science_Notes

◻️ Revision 5. Surface Chemistry Notes
https://t.me/CBSE_Class_11_12th_Science_Notes

◻️ Revision 6 General Principles and Processes of Isolation of Elements
https://t.me/CBSE_Class_11_12th_Science_Notes

◻️ Revision 7. The p-Block Elements Notes
https://t.me/CBSE_Class_11_12th_Science_Notes

◻️ Revision 8. The d-and f-Block Elements Notes
https://t.me/CBSE_Class_11_12th_Science_Notes

◻️ Revision 9. Coordination Compounds Notes
https://t.me/CBSE_Class_11_12th_Science_Notes

Class 10 Notes

May 11, 2026, 08:12 PM

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Class 10 Notes

May 11, 2026, 08:12 PM

Class 12 Physics Revision Notes

◻️ Revision 1 Electric Charges And Fields
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◻️ Revision 2. Electrostatic Potential And Capacitance
https://t.me/CBSE_Class_11_12th_Science_Notes

◻️ Revision 3. Current Electricity
https://t.me/CBSE_Class_11_12th_Science_Notes

◻️ Revision 4. Moving charges and Magnetism
https://t.me/CBSE_Class_11_12th_Science_Notes

◻️ Revision 5. Magnetism And Matter
https://t.me/CBSE_Class_11_12th_Science_Notes

◻️ Revision 6. Electromagnetic Induction
https://t.me/CBSE_Class_11_12th_Science_Notes

◻️ Revision 7. Alternating Current
https://t.me/CBSE_Class_11_12th_Science_Notes

◻️ Revision 8. Electromagnetic Waves
https://t.me/CBSE_Class_11_12th_Science_Notes

Class 10 Notes

May 11, 2026, 08:12 PM

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2. Control & Co ordination Part 1

Part 2 -
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Class 10 Notes

May 11, 2026, 08:12 PM

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2. Control & Co ordination Part 2

Part 1 -
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Class 10 Notes

Mar 30, 2026, 10:05 PM

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Class 10 Notes

Mar 30, 2026, 10:05 PM

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Class 10 Notes

Mar 30, 2026, 10:05 PM

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Mar 30, 2026, 10:05 PM

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