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4. Bees see blue and purple the best. Over time, some plants have developed blue flower
petals and a place for bees to land. How might these features help the plant?

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 these organisms have the greatest amount of cell specialized

Explain why biological control methods are generally environmentally superior to chemical pest control methods.