scientist,discoveries.

1. PRESENTED BY
ANCY.A.R
Natural Science

2. CHARLES DARWIN
Born on: 12 February 1809;Shropshire,England
Died on: 19 April 1882; Kent, England.
He was an British naturalist and geologist.
Formulated the theory of Evolution.

3. CHARLES DARWIN

4. CONTRIBUTIONS
Discovered the “ Theory of Evolution By Natural
Selection” .
In 1859, he published his
findings on his book
“The Origin Of Species”.

5. ACHIEVEMENTS
FRS award in 1839.
Royal Medal in 1853.
Wollaston Medal in 1859.
Copley Medal in 1864.

6. LOUIS PASTEUR
Born on: 27 December, 1822 at Dole, France.
Died on: 28 September, 1895 at Saint-Cloud,
France.
He was a French chemist and a microbiologist.
He was considered as the Father of Immunology.

7. LOUIS PASTEUR

8. CONTRIBUTIONS
Spontaneous Generation (disproved)
Alcoholic Fermentation
Germ theory of disease
Pasteurization
Methods of Sterilization
Vaccines (Rabies, Chicken Cholera, Anthrax,etc)
Survival of bacteria in anaerobic conditions
Study of molecular asymmetry

10. ACHIEVEMENTS
 In 1856 Royal Society of London presented him
Rumford Medal (nature of racemic acid ).
 In 1859 French Academy of Sciences awarded
him Montyon Prize (experimental physiology).
 In 1874, he was awarded the Copley Medal
(fermentation).
 In 1895, he won Leeuwenhoek Medal ---
Microbiology’s hightest Dutch honour.

11. GREGOR JOHANN MENDEL
Born on: 20 July 1822 at Brunn, Austria.
Died on: 6 January 1884 at Hungary, Austria.
He was a German-speaking scientist.
Laid the mathematical foundation of the science
of genetics (Mendelism).
He was recognized as the Father of Genetics.

12. GREGOR JOHANN MENDEL

13. CONTRIBUTIONS
He founded the science of genetics.
Identified many rules of heredity.
He identified the genes; recessive and dominant
traits.
Established momentously that traits pass from
parents to their offspring in a mathematically
predictable way.

14. ACHIEVEMENTS
 He was elected Vice President of the National
Science Society in 1868.
 He was nominated for the Order of Franz Josef
in 1872.
 He was awarded the Medal of the Heitzing
Horticultural Society in 1882.

15. HAR GOBIND KHORANA
Born on: 9 January 1922 at Raipur , Punjab.
Died on: 9 November 2011 at Concord , USA.
He was an Indian- American biochemist.
He was famous for his research on role of
nucleotides in protein synthesis for which he won
the Nobel Prize.

16. HAR GOBIND KHORANA

17. CONTRIBUTIONS
First scientist to chemically synthesize
oligonucleotides.
Showed how the nucleotides in nucleic acids
control protein synthesis.
He made the first artificial copy of a yeast gene.
He investigated mutations in rhodopsin.

18. ACHIEVEMENTS
 In 1968, the Nobel prize in Physiology or
Medicine was awarded jointly to Har Gobind
Khorana, Robert. W. Holley and Marshall. W.
Nirenberg “for their interpretation of the genetic
code and its function in protein synthesis”.

19. M.S. SWAMINATHAN
Born on: 7 August 1925 at Kumbakonam in
Tamilnadu.
He is an Indian geneticist and international
administrator.
He is known as “Indian Father of Green
Revolution”.

20. M.S. SWAMINATHAN

21. CONTRIBUTIONS
He produced a high-tech invention in wheat crops
that paved the way for a green revolution in India.
He created a wheat plant by cross breeding seeds
from Mexico with a local species that produce
plentiful grains.
Iminent famine was averted not only in India but
throughout Asia.

22. ACHIEVEMENTS
Padma Shri award in 1967; Padma Bhushan in
1972 and Padma Vibhushan in 1989.
Borlaug award in 1971 for his pioneering work in
wheat.
Indira Gandhi Prize in 2000 for peace,
disarmament and development.
Krishi Ratna award in 1986.
Global Environment Leadership award in 1995.
Currently, he holds the UNESCO chair in Eco-
technology and its chairman of the Dr. M.S.
Swaminathan Research Foundation, Chennai.