The first form of life originated in . . . . . . .
- AWater
- BAir
- CAt $8000^{\circ}C$ temperature
- DVapor form
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The early atmosphere contained methane and other hydrocarbons. They have now been replaced by:
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View SolutionAfter about how many years of the formation of Earth,did life appear on this planet?
The primitive or early atmosphere was composed of which mixture?
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View SolutionGiven below are some major events in the early history of life:
$I.$ First heterotrophic prokaryotes
$II.$ First eukaryotes
$III.$ First autotrophic prokaryotes
$IV.$ First animals
Choose the correct sequence of these evolutionary events.
$I.$ First heterotrophic prokaryotes
$II.$ First eukaryotes
$III.$ First autotrophic prokaryotes
$IV.$ First animals
Choose the correct sequence of these evolutionary events.
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View SolutionAccording to the theory of chemical evolution (often discussed in the context of the origin of life), which of the following represents a logical sequence of the formation of complex molecules?
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