Explanation

Microbiology is the scientific study of microorganisms, those being unicellular, multicellular, or acellular.

Important GK 

Agrostology: Study of Grasses 

Agronomy: soil management and crop production 

Odontology: study of teeth 

Arthrology:Study of joints 

Nephrology: study of kidneys

Hematology: Study of blood  

Dermatology:  Study of skin