Before revision: They usually specialize in a particular branch (e.g., molecular biology , zoology, and evolutionary biology) of biology and have a specific research focus (e.g., studying malaria or cancer).
After revision: They usually specialize in a particular branch (e.g., geneticbotany, entomology, anthropology, hygiene and prophylaxis , zoology, and evolutionary biology) of biology and have a specific research focus (e.g., studying malaria or cancer).