There are three animal phyla that include “worm” in their common names. Why aren’t all worms placed into one phylum? What is different about each group of organisms that requires us to classify them into multiple phyla? Provide examples

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.

Write a paragraph at least 5 sentences “why all vaccinations should be mandatory”

Long term exposure to waves can cause sunburns and skin cancer.