Which of the following statements regarding the process of speciation is correct?

Speciation occurs so slowly that scientists have never observed the emergence of a new species.

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Speciation only occurs slowly as small genetic changes accumulate from generation to generation.

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Speciation can occur as a result of changes in a single gene.

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Speciation requires the geographic isolation of a small population from a larger parent population.

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Solution

The correct option is A Speciation occurs so slowly that scientists have never observed the emergence of a new species.
Speciation occurs most of the times slowly through accumulation of small genetic changes over generations, a process also referred to as microevolution.
So, the correct answer is 'Speciation only occurs slowly as small genetic changes accumulate from generation to generation'

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Similar questions

	List I		List II
A	It is the formation of new species from an existing one due to reproductive isolation of a section of its population. Speciation is of two types, .........................	1	Reproductive isolation
B	and .................... speciation is the formation of new species from populations occurring in different and mutually exclusive areas of distribution.	2	Microevolution
C	Sympatric speciation is the development of new species from a segment of the population in the same area due to some intrinsic factors like mutations. ...................... is different from both microevolution and macroevolution.	3	Allopatric
D	..................... is the formation of new variants due to gene mutation and gene recombination, e.g., pesticide resistance, high temperature.	4	Sympatric
E	....................... is the development of different genera and higher taxa.	5	Speciation
F	For speciation to occur, the ................ of a section of the population should separate from the rest, resulting in stoppage of gene flow and accumulation of variations, some of which do not allow it to interbreed with the parent population.	6	Macroevolution
G	The inability of individuals of two populations to interbreed due to differences in morphology of reproductive organs, behavior, mating times and physiological incompatibility is called .......................	7	Gene pool

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