Genotypes: 25% homozygous dominant, 50% heterozygous, 25% homozygous recessive
Phenotypes: 75% white, 25% black
Answer:
D. This is an example of directional selection in which one end of the bell curve is better adapted to its environment than the other end.
Explanation:
Directional selection is when one extreme end of a trait of a population is favored. In this scenario, the trait being discussed is the length of a giraffe's neck with the long necked giraffes having an advantage. Their ability to reach more food increases their chances of making it to reproductive age and pass on their genes. Therefore, natural selection pressures giraffes to adapt and evolve over time to increase their chances of survival as a species.
~Hope this Helps!~
More information from the question is needed to be sure but I assume it would be that it is more effective than scented or moisturizing hand soap that is not designed to specifically kill bacteria.
