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प्रश्न
Which of the following gas was not present in early earth atmosphere?
(a) Ammonia
(b) Oxygen
(c) Hydrogen sulphide
(d) Methane
उत्तर
Oxygen was absent in early earth atmosphere.
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संबंधित प्रश्न
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List three distinguishing features, in tabular form, between acquired traits and the inherited traits.
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What are genes? Where are the genes located?
Match the terms given in column I with those given in column II :
| Column I | Column II |
| (1) Fossil | (a) A famous evolutionist |
| (2) A theory of evolution | (b) Survival of the fittest |
| (3) Probable ancestor of birds | (c) Petrified remains of prehistoric life |
| (4) Charles Darwin | (d) Father of genetics |
| (5) Gregor Mendel | (e) Archaeopteryx |
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(b) the soil
(c) the ground
(d) the air
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Short answer question.
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