(A) The $Himalayan$ mountain ranges act as a significant geographical barrier that separates the $Palaearctic$ and $Oriental$ zoogeographical regions.

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(A) The $Himalayan$ mountain ranges act as a significant geographical barrier that separates the $Palaearctic$ and $Oriental$ zoogeographical regions. These high mountain ranges prevent the free movement of fauna between the two regions, leading to distinct evolutionary paths for the species found in each area.

Class 12 Biology Evolution Mix Examples- Evolution

Medium

Two zoogeographical regions separated by high mountain ranges are

A
Palaearctic and Oriental
B
Oriental and Australian
C
Nearctic and Palaearctic
D
Neotropical and Ethiopian

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Class 12 Questions

Class 12

Biology Questions

Chapter

Evolution

Subtopic

Mix Examples- Evolution

Which one of the following is not a living fossil?

MediumAIPMT 2006

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Darwinian theory was unable to explain:

Medium

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Match the columns:

Column-$I$ Column-$II$

$(1)$ Mutation $(a)$ Change in population allele frequencies due to chance alone.

$(2)$ Gene flow $(b)$ Difference in survival and reproduction.

$(3)$ Natural selection $(c)$ Immigration,emigration change allele frequencies.

$(4)$ Genetic drift $(d)$ Source of new alleles.

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