It's "It prevents the two populations from interbreeding" I just took the test.
Answer:
population level
Explanation:
it ocurrs at the population level as scientists requires genetic variation between individuals of a population for natural selection
It has been stigmatized as result of its higher prevalence among the youths.
Answer: where are the options?
Explanation:
Mainly because it was extremely hot at the beginning of Earth's time.
