Give difference Amongest Lamarckism, Darwinism and Mutation Theory.
 

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Properties Lamarckism Darwinism Mutation Theory
$(a)$ Vital force The theory believes that every organism has an internal vital force that tends to increase its size upto a certain limit. Darwinism does. not believe in internal vital force. No internal vital force is involved.

$(b)$ Conscious Reaction

Animals with well developed nervous system react consciously to any change in environment. Darwinism does not involve any conscious reaction. No conscious reaction is belived to take part in the process of evolution.
$(c)$ Appetency The theory considers appetency or desires on the part of animals an important force in the development of modifications. It is not a constituent of the theory. Appetency is not involved.
$(d)$ Use and disuse The organs put to more use are believed to develop more while organs not used begin to degenerate. The theory is silent about use and discuss of organs. The theory is silent about it.

 

Similar Questions

Complete fossil of whose among the following is found

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

The three natural processes that form the basis for evolution are

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

 

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]