Question

read each example and decide what the resulting effect on the gene pool of that population would be. a zebra migrates to join a different herd of zebras. creates new alleles from dna brings new alleles from other populations randomly selects alleles favors certain alleles done competition for sunlight leads to taller trees. the dna of a snake changes to make its venom stronger. a grassfire randomly sweeps through a population of buffalo

Explanation:

Answer:

A zebra migrates to join a different herd of zebras. → brings new alleles from other populations
Competition for sunlight leads to taller trees. → favors certain alleles
The DNA of a snake changes to make its venom stronger. → creates new alleles from DNA
A grassfire randomly sweeps through a population of buffalo → randomly selects alleles