Which of the following is not considered true for species?

Members of species can interbreed.

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Each species is reproductively isolated from every other species.

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Gene flow does not occur between populations of a species.

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Variations occur among members of a species.

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Solution

The correct option is C Gene flow does not occur between populations of a species.
A species is a group of organisms that share a genetic heritage, are able to interbreed, and to create offspring that are also fertile. Different species are separated from each other by reproductive barriers. Gene flow is possible between population of a species due to interbreeding.
So, the correct option is 'Gene flow does not occur between populations of a species'.

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Similar questions

A species was defined as ‘A population of interbreeding individuals which are reproductively isolated from other populations’ by

	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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