Question

According to the model by Case and Taper, gene flow plays a role in limiting species ranges because

Answer 1

Answer:

D,

Explanation:

The Alleles moving into the marginal populations are adaptive for the conditions at the center of the species range. They therefore limit the species  range within the population  because their genes  are well expressed in the new population.And thus   increases the population sizes and variation in the (while increasing the fitness)Hence, limiting  species range and therefore promotes species expansion.