Trilobites were evolved during
Salvian
Cambrian
Pre-cambrian
Devonian
(b)The orgin of trilobites is considered about $505-510$ millions of years ago during cambrian period. They become extinct in permian period.
Basic unit of evolution is
Stanley Miller had put the Oparin-Haldane theory to test in $1953$ by creating in the laboratory, the probable conditions on the primitive earth. In the experiment simple aminoacids were synthesized from which of the following mixtures, as observed after eighteen days?
Early atmosphere contained methane and other hydrocarbons. They have been now replaced by
The Chronological order of human evolutionfrom early to the recent stages is
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