Assertion : Natural selection is the outcome of difference in survival and reproduction among individuals that show variation in one or more traits.

Reason : Adaptive forms of a given trait tend to become more common; less adaptive ones become less common or disappear.

  • [AIIMS 2004]
  • [AIIMS 2012]
  • A

    If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.

  • B

    If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.

  • C

    If the Assertion is correct but Reason is incorrect.

  • D

    If both the Assertion and Reason are incorrect.

Similar Questions

Match the columns :

Column - $I$ Column - $II$
$(1)$  Charles Darwin $(a)$  Mutation theory
$(2)$  Lamarck $(b)$ Germ plasm theory
$(3)$  Hugo de vries $(c)$ Philosophie zoologique
$(4)$  Ernst Haeckel $(d)$ The origin of species
$(5)$  August Weismann $(e)$  Biogenetic law
  $(f)$ Eassy on population

 

Match the columns :

Column - $I$ Column - $II$
$(1)$   Human embryos have gill $(a)$ Chemical evolution
$(2)$  Oparin and  Haldane $(b)$ Stimulation experiment
$(3)$  Miller and uray $(c)$ Wings of bird and butterfly
$(4)$  Analogous organ $(d)$ Outogeny repeats phylogeny

 

Select the incorrect statements

$I.$ Natural selection is essential for evolution

$II.$ Natural selection do not include variations

$III.$ Concept of natural selection was given by Hugo de Vries

$IV.$ Mutation is the sudden inheritable change

$V.$ Synthetic theory is also called Neo-Darwinism theory of evolution The correct combination is a

Definitions / Explanation : Analogous organs & Vestigial or rudimentary organs
 

Contribution of scientist : Hugo de Vries, Hardy - Weinberg and Ernest Haeckel.