Ans: Apicomplexa is parasitic alveolates and a kind of large phylum. Most of the Apicomplexia possess a unique form of organelle, which consists of a different type of plastid known as apicoplast. Apicomplexan is applied to penetrate host cells for adopting organelle. The apicoplast is also termed apical complex structure. These apicomplexans infect both vertebrates and invertebrates. They may cause serious illnesses. The genus plasmodium causing malaria in humans and other animals. About 300 million from 90 countries are yearly infected by malaria and every year about 1 million losing their life because of malaria.