Which structure is common to plant and animal cells? 48) ) chloroplast b. mitochondrion c. centriole d. central vacuole?

How did the research presented in the article affect scientists' understanding of the evolution of eukaryotes

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.

What best explains the inability for life to exist in earth early atmosphere