The process by which two species evolve in response to changes in each other over time is called
a. convergent evolution.
b. adaptive radiation.
c. coevolution.
d. punctuated equilibrium.

The use of dna as evidence in criminal investigations became possible because of the

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.

For this question look at the hydropic diagram water that is heated by the sun evaporates. select the number that represents it.