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

Vedclass pdf generator app on play store
Vedclass iOS app on app store

Gave mutation theory it states that evolution occurs by a single step large mutations that are random and directionless.

Reinterpreted Baer's law in the form of recapitulation theory in the light of evolution.

Gave Hardy Weinberg principle, it states that allele frequencies in population are stable and remain constant from generation to generation.

Similar Questions

Definitions / Explanation : Analogous organs & Vestigial or rudimentary organs
 

Definitions / Explanation : Homology & Adaptive radiation or divergent evolution

 

Match the following.

Column $- I$ Column $- II$
$(A)$ Lamark $(p)$ Finch bird
$(B)$ De Vries $(q)$ Evening primerose
$(C)$ Darwin $(r)$ Giraffes
$(s)$ Melanic moths

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

Definitions / Explanation : Evolution & Theory of species creation