Q. 41. When the life appear on the earth after it’s formation?
(A) After 200 million years
(B) After 300 million years
(C) After 500 million years
(D) After 250 million years
Answer:
(C) After 500 million years
Explanation:
The provided passage states explicitly, “Life appeared 500 million years after the formation of earth, i.e., almost four billion years back.”
Q. 42. According to the early Greek thinkers, the unit of life which were transferred to different planets were
(A) spores
(B) water
(C) oxygen
(D) methane
Answer:
(A) spores
Explanation:
The passage mentions that early Greek thinkers believed units of life called “spores” were transferred to different planets, an idea tied to the theory of Panspermia.
Q. 43. Louis Pasteur by careful experimentation demonstrated that life comes from –
(A) killed yeast
(B) rotting matter
(C) other plants
(D) pre-existing life
Answer:
(D) pre-existing life
Explanation:
The passage clarifies that Louis Pasteur, by careful experimentation, demonstrated definitively that “life comes only from pre-existing life,” thereby refuting spontaneous generation.
Q. 44. Oparin and Haldane proposed the theory that the first form of life could have come from –
(A) Non-living organic molecules
(B) Inorganic molecules
(C) UV rays
(D) CO2 and water
Answer:
(A) Non-living organic molecules
Explanation:
As stated in the passage, Oparin and Haldane proposed that the very first form of life would have emerged from pre-existing “non-living organic molecules” like RNA and proteins.
Q. 45. The theory of Chemical evolution was studied and tested in laboratory by –
(A) Charles Darwin
(B) S.L. Miller
(C) Louis Pasteur
(D) Haldane
Answer:
(B) S.L. Miller
Explanation:
The text indicates that in 1953, American scientist S.L. Miller created similar primitive conditions on a laboratory scale and observed the formation of amino acids, which supported chemical evolution.
