Biology - Evolution Question with Solution | TestHub
Given below are two statements, one is labelled as Assertion (A) and other one labelled as Reason (R).
Assertion (A): Sympatric speciation occurs in a single population without geographical isolation.
Reason (R): The formation of species is due to reproductive isolation and mutation.
In light of the above statements, choose thecorrectanswer from the options given below.
Options:
Answer:
Solution:
Assertion (A) is true because sympatric speciation is defined as the evolutionary process where new species evolve from a single ancestral species while inhabiting the same geographic region. It occurs without geographical isolation.
Reason (R) is also true because the formation of new species (speciation) fundamentally depends on reproductive isolation, which prevents gene flow between populations, and mutations, which introduce genetic variations leading to divergence.
However, Reason (R) is a general statement about the mechanism of speciation and does not specifically explain why sympatric speciation occurs without geographical isolation (which is typically driven by factors like polyploidy, sexual selection, or microhabitat differentiation). Therefore, both (A) and (R) are true, but (R) is NOT the correct explanation of (A).
Answer: Both (A) and (R) are true but (R) is NOT the correct explanation of (A).
