Consider the model for natural selection. Describe a scenario that represents this model of natural selection.

AIn a population of rabbits, some are brown all year long. When it snows these rabbits cannot hide from predators and they become extinct.

BIn a population of sunflowers, mutations cause some flower heads to produce more seeds. More seeds means that there are more sunflower plants over time.

CIn a populations of birds, mutations result in different beak sizes so the birds do not compete for food in the area. The bird population is made up of birds with many different types of beaks.

DIn a population of herbivores, a change in the habitat provides leaves that are high up in the trees. The herbivores with longer necks can reach the leaves. They survive and reproduce. The herbivores, over time, have longer necks.

The correct answer would be D) In a population of herbivores, a change in the habitat provides leaves that are high up in the trees. The herbivores with longer necks can reach the leaves. They survive and reproduce. The herbivores, over time, have longer necks.

Natural selection is a gradual process which favors the survival and reproduction of organisms which have better adapted to the environment.

Adaptations or traits which favor the survival of the organisms in environment keep on passing from one generation to the next and with time theses traits get inherited in the population.

For example, in the above situation herbivores with short necks die as they could not reach the leaves that were high up in the trees. In contrast, long neck favors the survival of the organisms due to which only organisms with long necks survive and reproduce. With time, only organisms were left that had long necks.

ciearagillie ciearagillie · Answer 2 · 2019-12-05T13:01:39-05:00

Answer:

D) In a population of bacteria, variations exist due to mutation. The bacteria are subjected to antibiotics. Some bacteria die; others survive and reproduce. Eventually, the bacteria a resistant to the antibiotics.

Darwin would say: In a population of bacteria, variations exist due to mutation. The bacteria are subjected to antibiotics. Some bacteria die; others survive and reproduce. Eventually, the bacteria a resistant to the antibiotics.