Which is true of the population shown in this graph?

a.
it shows the effect of overpopulation on a species.

b.
the number of individuals will eventually drop to zero.

c.
the population has increased until it reached its carrying capacity.

d.
there are no limiting factors to control population growth.

The gene that causes sickle-cell disease is present in a higher percentage of residents of sub-saharan africa than among those of african descent living in the united states. even though this gene causes sickle-cell disease, it also provides some protection from malaria, a serious disease that is widespread in sub-saharan africa but absent in the united states. discuss an evolutionary process that could account for the different percentages of the sickle-cell gene among residents of the two regions.

The cluster of developing cells from conception until birth is called an

2. which is the last step in the scientific method?