Quais fatores bióticos e abióticos podem se relacionar com as populações e comunidades biológicas?

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.

Match the description of each organism to the appropriate category

If jane has the blood type ab and marries john who has type o blood what are the possible phenotypes of their first kid?