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Q1. In water hyacinth and water lily, pollination takes
place by
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2 289
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🌟 Important Points of NCERT 🌟
1. 1770 : Joseph Priestley - Essential role of air in growth of green plant.
2. 1774 : Joseph Priestley - Discovered O2.
3. 1831 : Robert Brown - Ist discovered and described nucleus.
4. 1838 : Schleiden (German Botanist) - Work on plants.
5. 1839 : Schwann(British Zoologist) - Work on both plants & animals.
6. 1855 : Rudolf Virchow - Omnis cellula-e-cellula (cells arises from
pre-existing cells).
7. Life originate from pre-existing life : Pasteur (Yeast).
8. Life originate from non-living (decaying & rotting matter) : Spontaneous
generation.
9. Life originate from pre-existing non-living organic molecules (RNA,
Protein)- Oparin (Russia) & Haldane (England)- Chemical Evolution.
10. 1856 - 1863 : Mendal experiment on garden pea. (7 years)
11. 1860 : Julius von Sachs - Developed hydroponics.
12. 1865 : Mendal published his work.
13. 1866 : Langdon Down - Down’s syndrome.
14. 1869 : Friedrich Meischer - Ist identified DNA and named it nuclein.
15. 1891 : Henking - Discovered X-body.
16. 1891 : Fossil discovered in Java - Homo erectus.
17. 1892 : Ivanowsky - Discovered virus.
18. 1898 : Beijerinek - Contagium vivum fluidum (infectious living fluid).
19. 1898 : Camillo Golgi - Discovered (observed) G.B.
20. 1900 : de Vries, Corre ns and von Tsche rmak inde pende ntly
rediscovered Mendel’s results.
21. 1902 : Chromosome movement during meiosis has been worked out.
22. 1905 : Law of limiting factor (Blackmann).
23. 1928 : Fredrick Griffith - Transforming experiment with Streptococcus
pneumoniae (Diplococcus).
24. 1935 : Stanley - Crystallised viruses.
25. 1937 : Ramde o Misra obtained Ph.D. in Ecology from Lee ds
university (U.K.).
26. 1938 : Coelocanth fish caught in South Africa.
27. 1945 : Fleming, Chain & Florey - Awarded Nobel prize.
28. 1950 : Watson obtained Ph.D. on a study of the effect of hard X-rays
on bacteriophage multiplication.
29. 1951 : Family planning programme started in India.
30. 1952 : Hershey & Chase-experiment on bacteriophage or Bacterial virus
gives unequivocal proof that DNA is the genetic material.
31. 1953 : Miller experiment - Methane, ammonia, hydrogen & water
vapour.
32. 1953 : Watson & Crick - Double helical structure of B-DNA &
replication scheme.
33. 1953 : Palade : Discovered ribosome.
34. 1954 : Ramachandran - Triple helical model of collagen, published
in Nature.
35. 1954 : Crick complete d Ph.D. on a thesis “X-rays diffraction :
polypeptides and proteins.
36. 1958 : Meselson & Stahl - Work on E.coli proves semiconservative
replication of DNA in prokaryotes.
37. 1958 : Taylor - Work on Vicia faba proves semiconservative replication
of DNA in eukaryotes.
38. 1960 : Katherine Esau - Published “Anatomy of Seed Plants.”
39. 1961 : Melvin Calvin - Nobel Prize.
40. 1962 : Watson, Crick and Wilikins - Nobel Prize.
41. 1963 : Wheat varieties (Sonalika & Kalyan sona) introduced.
42. 1963 : Two enzyme responsible for restricting growth of bacteriophage
in E.coli were isolated.
43. 1966 : Derivative of IR-8 & Taichung native-I introduced.
44. 1969 : Whittaker - Five kingdom classification.
45. 1971 : Govt. of India legalized MTP.
46. 1971 : Diener- Discovered Viroid(free RNA without capsid).
47. 1972 : Singer & Nicolson - Fluid mosaic model.
48. 1972 : Stanley Cohen & Herbert Boyer - Formed Ist recombinant DNA.
49. 1972 : Establishme nt of NCEPC - National Committe e for
Environmental Planning & Coordination.
50. 1974 : Water act.
51. 1980 : Joint forest management, (JFM).
52. 1981 : AIDS was Ist reported.
53. 1981 : Air act.
54. 1983 : Eli Lily (An American company) produces insulin in E.coli by
recombinant DNA technology.
55. 1984 : Establishment of MOEF : Ministry of Environment & Forest.
56. 1986 : Environment Protection Act.
57. 1987 : Montreal protocol. Held in Montreal, Canada.
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2 289
Aryan sir has explained the concept of Energy stored in capacitor in lucid way. capacitance series.
https://youtu.be/1BR_lnBMZ38?si=t-7dRPVDtnAw31Xd https://youtu.be/1BR_lnBMZ38?si=t-7dRPVDtnAw31Xd
see👀 this lecture at the end.
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*In this video parallel combination of capacitor has covered thoroughly.*
https://youtu.be/YOoa-9k32Ms?si=l2A_fZ9IJ5HHdImi
https://youtu.be/YOoa-9k32Ms?si=l2A_fZ9IJ5HHdImi
See Video properly 👀
#physics
2 289
In this video, Aryan sir has explained the combination of capacitor. In this video Series combination of capacitor has covered throughly. All theoretical understanding with necessary figures and illustration has discussed in this video. This video will help you to understand the actual working of series capacitor.
https://youtu.be/C7hX-2UXM9Q?si=Hv-g0jBgpxb74ZT5
https://youtu.be/C7hX-2UXM9Q?si=Hv-g0jBgpxb74ZT5
Physics
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2 289
Ye video banate time maine bola dhyan se dekho aur maine hi dhyan se nahi dekha. Baad me dekha. Aaj to mai Spiderman ban gaya hota 😂.
Asteraceae (Compositae) family is described with practical.
Stay tuned to @neetjeeanonimo
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+4▫️Current and Electricity ™
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