Darwinian Theory of Evolution is based on which of these key concepts 1 Branching descent 2 Natural ...........

Statement 1: Descent with Modification ("Evolution") has occurred by branching (different species share common ancestral species)

Evolution (what Darwin more descriptively called "Descent with Modification") embodies 2 separable aspects:

 

? Change within a lineage

? Branching (different species share ancestors: Descent = Cladogenesis)

 

Branching theory says that species lineages usually change over time (though rates of change may vary) and are derived from common ancestral lineages; natural selection is the main, but not

exclusive, mechanism.