A) are isolated but occasionally come together to interbreed
B) share the same environment but cannot interbreed
C) live together and freely interbreed to produce sterile offspring
D) are physically isolated by natural barriers
Correct Answer: B
Solution :
There are some suggested case of sympatric populations evolving into separate species (eg, fish in the same lake and insect living on different species of food plants in the same habitat). This is called sympatric speciation. These isolated populations are incipient species which cannot interbreeds.
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