Early atmosphere contained methane and other hydrocarbons. They have been now replaced by
Nitrogen
Oxygen
Carbondioxide
Hydrogen
'Ontogeny Recapitulates Phylogeny' is narrated in which of the evidences for organic evolution?
Which primitive man had a cranial capacity of about $ 800 -1000$ $ cc$
$A$ : Lycaenops is a connecting link between reptiles and mammals. $R$ : In permian period there was origin of mammal like reptiles.
Photosynthetic bacteria evolved on earth about ……. million years ago
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