17.theory of eternity of life was proposed by
a. Francesco Redi
b. 
Oparin
c. Anaximander
d. Preyer
18. Theory of catastrophism was proposed
 by
 a.cuvier
 b. Oparin and Haldane
 c. Preyer
 d. Richter
19. Theory of 
panspermia was proposed by ....
 a. Arrhenius
 b. Richter
 c. Oparin and 
Haldane
 d. Pasteur .
20. Therory of Abiogenic origin of life was proposed
 by
 a.Oparin
 b.Haldane
c.Both a and b
 c.Cuvier
21. The early molecular 
forms on earth were
a.Water and  Hydrogen cyanide
 b.Carbon dioxide and 
carbon monoxide
 c.Methane and ammonia
 d.All of these
22.Which gases were
 used by Miller and Urey in their experiment
 a. Methane,ammonia, water 
vapours,hydrogen
 b. Methane,ammonia,nitrogen and water vapours
 c. 
Methane,nitrogen,hydrogen and water vapours
 d. Ammonia,carbon 
dioxide,nitrogen and water vapours.
 23. Origin of life took place in
 a. 
Air
 b. Soil
 c. Water
d. On other planet
24.Which molecule was absent in 
the atmosphere at the time of origin of life
 a.methane
 b.oxygen
 c.hydrogen
 d.carbon dioxide
 Ans c3: 17d 18a 19a 20c 21 d 22 a 23c 24b.
BY : ASHWANI KUMAR BIOLOGY TEACHER VIGYAN TUTORIALS PATELNAGAR PHAGWARA 9646388266