Venus and Mars are primarily composed of D.) CO2
That affirmation is correct.
Further information:
It is estimated that about 3/4 of all species where extinct.
This event gave way to the Cenozoic era, which is the one we live in today.
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Nondisjunction is the failure of homologous or sister chromatids to separate properly during cell division .There are 3 forms of non junctions.1)failure of a pair of homologous chromosome to separate in meisis 1
