Sibling species are also known as
Sub-species
Genus
Subline species
Biological races
It's Obvious
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?
A closed system is one which
Gill clefts and notochord appear in the embryonic development of all vertebrates from fishes to mammals. This supports the theory of
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