Question

If speciation takes place due to geographical isolation, it is called

• A. Allopatric speciation
• B. Sympatric speciation
• C. Anagenesis
• D. Cladogenesis

Hint:

{Darwin's Finches} are a classic example of Allopatric speciation (adaptive radiation on isolated islands).

Answer 1

The Correct Option is A

Step 1: Understanding Speciation Terms:

• Allopatric Speciation: Speciation that occurs when biological populations of the same species become completely isolated from each other by a geographical barrier (like a mountain or ocean). (Allo = other, patric = land).
• Sympatric Speciation: Speciation occurring within the same geographic area, often due to polyploidy or behavioral isolation.
• Anagenesis: Phyletic evolution (gradual change of one species into another without splitting).
• Cladogenesis: Splitting of one lineage into two.

Step 2: Final Answer:
Geographical isolation leads to Allopatric speciation.