Question:

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R 

Assertion (A) : The Cro-Magnon man was the direct ancestor of the living modern man.

Reason (R) : Cro-Magnon man had slightly prognathous face.

In the light of the above statements, choose the correct answer from the options given below

Updated On: Mar 29, 2024
  • If both assertion and reason are true and reason is the correct explanation of assertion
  • If both assertion and reason are true but reason is not the correct explanation of assertion
  • If assertion is true but reason is false
  • If both assertion and reason are false
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The Correct Option is C

Solution and Explanation

Cro-Magnon man had orthognathous face (jaws do not project forward) with an arrow, elevated nose, broad and arched forehead, moderate brow ridges, strong jaws with man-like dentition and a well developed chin.
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Concepts Used:

Evolution

Evolution is a process that occurs in changes in the genetic content of a population over time. Evolutionary change is generally classified into two: microevolution and macroevolution. The process of changes in allele frequencies in a population over time is a microevolutionary process. Three main mechanisms that cause allele frequency change are natural selection, genetic drift, and gene flow. On the other hand, macroevolution refers to change at or above the level of the species.