FtsZ is a cytoskeletal protein found in bacteria that forms a contractile ring during bacterial cytokinesis. The functioning of this protein is most similar to that of

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.

Which of the following produces carbon dioxide? a. plants b. animals c. decomposers d. all of the above

Witch theory suggests all living things are made up of cell or cells