Many factors can affect the composition of the human gut microbiome except: Host genetics Stress Excessive hygiene Skin microbiome Question 26 (2 points) The gut microbiome can rapidly change in response to a plant-based diet by increasing bacteria of the Firmicute Phyla. True False Question 27 (2 points) Increased childhood obesity can be linked to an unhealthy microbiome caused by all of the following except: Repeated use of antibiotics Excessively sterile environment Diets high in plant fiber Cesarean section delivery.