Answer:
B) There is an increase in the number of giraffes with long necks in areas of Africa where low-growing trees have died
Explanation:
The directional selection is one of the ways of the natural selection in which the natural selection selects or favours the most extreme trait of the species and the extreme trait show higher fitness than the normal or average trait.
In the given question, the case of Giraffe necks shows directional selection as the normal length of the neck is not favoured by the environment but the extreme trait that is long neck is favoured by the environment and the selection shifted to that level.
Thus, Option-B is the correct answer.
The answer is a fault. A fault is a place where the crust of the lithosphere has fractured.
<u>Answer</u>: C. Neutralization of stomach acid.
Hydrochloric acid is one of the three components of the stomach acid. The other two are potassium chloride and sodium chloride.
It plays a key role in the destruction of some ingested microorganisms. It is also vital to the digestion of proteins by activating the enzyme pepsin.
You will have to expand more on this but I think it is helpful to make things more efficient to what we need them for and it could make a positive impact in that way but also negative impacts could be deformities or diseases by changing some things genetic makeup
