2022-05-24 04:18:11
1. Carolus Linnaeus Binomial Nomenclature
2. Carolus Linnaeus Used ‘Systema Naturae’ as the title of his publication
3. Carolus Linnaeus Two kingdom classification
4. R.H Whittaker (1969) Five kingdom classification
5. George Bentham & Joseph
Dalton Hooker
Natural classification system
6. Aristotle Earliest to attempt scientific basis of classification
7. Anton Von Leeuwenhoek First saw and described a live cell
8. Dimitri Ivanowsky (1892) Coined the name ‘virus’
9. M.W. Beijerinek (1898) Demonstrated that the extract of the infected plants of tobacco could cause infection in
healthy plants and called the fluids as Contagium vivum fluidum (infectious living fluid
10. W.M. Stanley (1935) Showed that the virus could be crystallised and crystals consists largely of proteins
11. T.O. Diener (1971) Discovered ‘viroids’
12. Robert Brown Discovered Nucleus
13. Matthias Schleiden (1838) Examined plants and observed that all plants are composed of different kinds of
cells which form tissues of plant
14. Theodore Schwann (1839) • Studied animal cells and reported that cells had a thin outer layer : Today known
as ‘Plasma Membrane’.
• Stated – Presence if cell wall is unique character of the plant
15. Schwann Proposed the hypothesis that bodies of plants and animals are composed of cells
and products of cells
16. Schleiden & Schwann Cell Theory
17. Rudolf Virchow (1855) Omnis cellulae-e cellulae (Modified Cell Theory)
18. Singer & Nicolson (1972) Fluid mosaic model of plasma membrane
19. Camillo Golgi (1898) Discovered Golgi apparatus
20. George Palade (1953) Observed ribosomes as dense particles under electron microscope
21. Robert Brown (1831) Describe nucleus as a cell organelle
22. Flemming Gave the name ‘Chromatin’ to the material of nucleus
23. Julius von Sachs (1860) Hydroponics
24. Joseph Priestley (1770) Revealed the essential role of air in growth of plants
25. Jen Ingenhousz (1730-1799) Showed that the sunlight is essential to plant process
26. Julius von Sachs (1853) Provided evidence for the production of glucose when plants grow
27. T.W. Engelmann (1843-1909) Described the first action spectrum of photosynthesis
28. Blackman (1905) Law of limiting factors
29. Gustav Embden, Otto Meyerhof. Parnas Glycolysis
30. F.W. Went Isolated Auxin from tip of coleoptiles of oat seedlings
31. E. Kurosawa (1926) Discovered Gibberellic acid
32. Charles Darwin & Francis Darwin Observed that coleoptiles of Canary grass responded to unilateral
illumination by growing towards the light source.
33. F. Skoog & co-workers Observed that internodal segments of tobacco stems the callus proliferated
only if, in addition to auxins the nutrients medium was supported with one of
the following – extract of vascular tissue, yeast extract, coconut milk or DNA
34 Miller et al (1955) Identified Kinetin
35. H.H. Cousins (1910) Discovered Ethylene
47. Watson & Crick (1953) Proposed ‘Semi-Conservative nature of DNA Replication’
48. Matthew Meselson & Franklin
Stahl (1958)
Experimental proof for ‘Semiconservative Nature of DNA Replication’
49. George Gamow Genetic code
50. Har Gobind Khurana Developed chemical method to synthesize RNA molecules with defined combination
of bases (homopolymers & copolymers)
51. Marshal Nirenberg Developed cell-free system for protein synthesis
52. Francois Jacob & Jacque Monod The Lac operon
53. Alec Jeffreys DNA fingerprinting
54. Early Greek Thinkers Theory of ‘Panspermia’
55. Louis Pasteur Life came from Pre-existing life
56. Oparin & Haldane Proposed ‘Chemical Evolution of Life’
57. S.L Miller Experimental proof for ‘Chemical Evolution of Life’
58. Charles Darwin Based on observations made during a sea voyage in a sail ship (H.M.S Beagle)
concludes that existing life forms share similarities not only among themselves but
also with life forms that existed millions of years ago
836 views01:18
D
