Multiple Choice Questions on Darwinian Theory of Evolution is based on which of these key concepts 1 Branching descent 2 Natural ........... for UPSC Civil Services Examination (General Studies) Preparation

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Multiple Choice Questions

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

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    Darwinian Theory of Evolution is based on which of these key concepts ?
    1.Branching descent
    2.Natural selection
    3.Genetic Tree
     
    Select the correct answer using the codes below

    1 and 2 only

    Correct Answer

    3 only

    Incorrect Answer

    1 and 3 only

    Incorrect Answer

    1, 2 and 3

    Incorrect Answer
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    Explanation:
    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.

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