Bacteria undergoing anaerobic respiration use alternative electron transport system carriers for the ultimate transfer of electrons to the final non-oxygen electron acceptors. True False Question 23 (2 points) Decreased phylogenetic diversity of the human microbiome is associated with good health outcomes. True False Question 24 (2 points) Which of the following are a function(s) of the human gut microbiome? Digestion and nutrient extraction Production of vitamins and metabolites Influences on mood and behavior All of the above.