Question

Populations are said to be sympatric when

• A. two populations live together and freely interbreed to produce sterile offspring
• B. two populations are physically isolated by natural barriers
• C. two populations are isolated but occasionally come together to interbreed
• D. two populations share the same environment but cannot interbreed.

Answer 1

The correct option is A two populations live together and freely interbreed to produce sterile offspring

Two related species or populations are considered sympatric when they exist in the same geographic area and thus frequently come in contact one another and are free to interbreed. The example is the mating of a female donkey and male horse to produce a sterile mule.

So the correct option is 'two populations live together and freely interbreed to produce sterile offspring