Since the species is not reaching its maximum population, we can think that there is an inhibiting factor in the ecosystem. So if more organisms were to migrate within the population or if the birth rate were to increase, the population would not follow the trend in the image. If the resources of the ecosystem were limited, the population would increase, but then they would start to die due to lack of resources so the graph would have a gaussian bell distribution.
Therefore, the answer is D, since the maximum load of the ecosystem has been reached and although the organisms continue to reproduce, the population cannot increase but neither does it decrease since there are sufficient resources.
Answer:
The dark colored moths were due to a genetic mutation, and were more than likely present before the Industrial Revolution. Their fitness was low because predators could easily see them on the light-colored trees. They would be eaten before they could reproduce and pass on their genetic mutation. After the trees became darkened by soot, the darker colored moths now had the survival advantage, able to "hide" from predators. The lighter colored moths became more visible to predators, and the advantage shifted. Now, the light colored moths were more visible to predators, were eaten, and didn't have the chance to reproduce. The darker moths with the mutation had the survival advantage, blending in with the soot-covered trees, and were able to reproduce at higher rates, passing the mutation on to later generations.
two angles that share a vertex and a side but no points in their interiors ... a point is in this if it does not lie on the angle itself and it lies on a segment with ... a measurable part of a line that consists of two points, called endpoints, and all of the ... an adjacent angle whose noncommon sides are opposite rays (supplementary).
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