Need ! the development of antibiotics has revolutionized the treatment of infectious diseases. however, antibiotic overuse is a major contributor to the development of antibiotic-resistant bacteria. antibiotic resistance is a genetic trait. what effect could antibiotic-resistant bacteria have on the population?

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.

In some plants, pointed leaves (p) are dominant over rounded leaves (p). a plant with a genotype of pp

In which of the following relationships is one organism always benefited while the other organism is always harmed