Answer:
Beneficial and harmful microbial flora
Step-by-step explanation:
Human microbial flora is extremely diverse and is best described as beneficial and harmful microbial flora because some microbial flora are good for living organisms and environment while others are harmful means causes damage to organisms and the environment. Microbial flora refers to those microorganisms which have similar characteristics to plants. Some examples of microbial flora are Staphylococcus epidermidis, Corynebacterium spp, Streptococci and Neisseria spp etc.