Malaria is a disease caused by the protist Plasmodium Which
Malaria is a disease caused by the protist Plasmodium. Which of the following is not a reason why malaria is very difficult to control?
| A) Plasmodium is a quickly adapting organism, which continuously varies its surface proteins. | 
| B) Our ability to combat diseases is best developed for prokaryotic pathogens, and Plasmodium is a eukaryote. | 
| C) In humans, Plasmodium survives mainly within human cells, making it difficult to target the parasite. | 
| D) Mosquitos are ubiquitous around the world and have proven impossible to control. | 
Solution
D) Mosquitos are ubiquitous around the world and have proven impossible to control.

