3 Malaria is a tropical disease characterized by severe chills, headache, and fever.
Malaria is caused by protists in the genus Plasmodium. The disease is spread from
human to human when mosquitoes bite an infected person and transfer Plasmodium
sporozoites to another person. Hoping to develop a product that prevents malarial
infection, a scientist researches chemicals that kill different types of organisms. How
might the scientist use a chemical to prevent the transmission of malaria from person
to person?
A. The scientist might develop a chemical that kills either the mosquito that trans-
fers the protist or the protist itself.
B. The scientist might develop a chemical that kills all Plasmodium sporozoites
found in water and food sources.
c. The scientist might develop a chemical that kills the protist after it has been
transmitted from one person to another.
D. The scientist might develop a chemical that treats the more severe symptoms of
malaria, such as chills, headache, and fever.