An island is on the migration route of sea birds. This island also has abundant tree-nesting birds that live on the island permanently and are not found on any other island. The two bird species do not interbreed. The tree-nesting birds are more likely than the sea birds to be in Hardy-Weinberg equilibrium because:
A. natural selection is stronger in the tree-nesting birds.
B. there are fewer mutations in the sea birds.
C. of high immigration and emigration in the sea bird population.
D. the sea bird population is larger.
E. mating is random in the tree-nesting birds.
Answer: C
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