The nucleic acid of a virus is made up of which of the following?
a) dna
b) rna
c) both dna and rna
d) either dna or rna

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.

According to this food web which of the following would be considered primary consumers

What sre the effects of hemolytic disease of a newborn