Answer:
B Physical separation of populations prevents interbreeding and mixing of gene pools.
Explanation:
Geographic isolation means two populations are unable to reproduce with one another. This means that over time, the variation in the gene pool will be different for one group compared to the other, and the species will genetically diverge from one another. resulting in speciation.
Answer:
cleaning
Explanation:
If people would clean up after themselves, the world's rivers and lakes would be clean. Water pollutants can be somewhat easy to remove by taking the trash out of them.
Using your reflexes can prevent you from getting hurt in the first place.
Answer:
One fertilizes the egg, and the other combines with the two polar nuclei.
Explanation: