Question

Given are the processes of speciation.

The correct sequence of these processes of speciation is?

• A. $2,3,1$
• B. $2,1,3$
• C. $3,1,2$
• D. $3,2,1$

Answer 1

The correct option is A $2,3,1$

• Speciation is the evolutionary process by which populations evolve to become distinct species.
• The separation of two populations of the same species or breeding group by a physical barrier, such as a mountain or body of water. Geographical isolation may ultimately lead to the populations becoming separate species by adaptive radiation.
• Reproductive isolation is the inability of a species to breed successfully with related species because of geographical, behavioral, physiological, or genetic barriers or differences.
• Once a population has become as homogeneous in appearance as is typical of most species, its members will avoid mating with members of other populations that look different from themselves. Thus, the avoidance of mates displaying rare and unusual phenotypic features inevitably leads to reproductive isolation.

So the correct answer is option A.