Definitions / Explanation : Recapitulation theory or Biogenetic law & Palaeontology
 

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This theory says that "Ontogeny recapitulates evolutionary history.

This means an organism repeats its ancestral history during its development.

It is the study of past life based on the fossil records. It furnishes the most direct and most reliable evidence for evolution.

Similar Questions

Definitions / Explanation : Analogous organs & Vestigial or rudimentary organs
 

$A$ : $A$ single large mutation called saltation can produce new species.
$R$ : Mutations are directional

Match the columns :

Column - $I$ Column - $II$
$(1)$ Mutation $(a)$ Change in population allele frequencies due to chance alone.
$(2)$ Gene flow $(b)$ Difference insurvival and reproduction
$(3)$ Natural selection $(c)$ Immigration, emigration change allele frequencies.
$(4)$  Genetic drift $(d)$ Source of new alleles.

 

$A$ : During evolution pouched mammals of Australia survived.
$R$ : Due to lack of competition from any other mammal due to continental drift

Evolution is