Discuss the reasons why the Human Microbiome Project is a step forward in characterizing normal and pathogenic biota in humans. Solution The Human Microbiome is defined a the collection of microbes- bacteria, viruses and single cell eukaryotes that inhabits the human body. Microbes in adult human body are estimated to outnumber human cells by a number of ten to one. The Human Microbiome project is a United States National Institute of Health initiative with a goal of identifying and characterising the microorganisms which are found in association with both healthy and diseased humans. The main goals of Human Microbiome Project is a step forward in characterising normal and pathogenic biota due to its goals which are as follows:.