PWEASE HELP ME ＞﹏＜ Due to the known mutualistic relationships between M. smithii, Bacteroides, and the human gut, why might overweight study subjects have a different methane and hydrogen profile compared to healthy weight study subjects?

Abiology teacher asks students to give examples of genetic variations that support the idea that changes in a population’s environment affect genetic variation. which is the least supportive example? a.changes in genetics in human populationsb.antibiotic resistance in bacteria populationsc.pesticide resistance in garden insectsd.changes in the color of the peppered moth population in england