Consider the following statements: 1. The atmosphere of the primitive earth was reducing 2. The primary source of energy for the chemosynthetic reactions on earth that led to the origin of life was the solar energy 3. Liquid water did not exist on early earth 4. Energy for the synthesis of organic molecules from simple inorganic molecules on earth was provided by lightening, ultra violet light, and cosmic rays Select the correct answer using the codes given below: (a) 1 and 2 (b) 1 and 4 (c) 1, 2, and 3 (d) 1, 3, and 4

1 Answer

Answer :

Ans:(d)

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Description : 6. In 1953 S L Miller created primitive earth conditions in the laboratory and gave experimental evidence for origin of first form of life from pre existing non living organic molecules. The ... -reducing atmosphere. d) High temperature, volcanic storms, reducing atmosphere and contains NH3 and CH4

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Last Answer : oxygen and ultraviolet rays

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Description : It is dangerous to observe solar eclipse with naked eyes because – (1) Infrared radiations from sun burn our retina (2) Ultraviolet radiations from Sun burn our retina (3) All radiations from sun initiate chemical reactions in eyes (4) Cosmic rays reach eyes more during the eclipse

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Last Answer : Ans:(c)

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