Question

role(s) of mutualistic bacteria include
select all that apply
a synthesis of vitamins.
b preventing the growth of harmful
microorganisms.
c digestion of unused nutrients.
d defending against some diseases.

Explanation:

• Option a: Mutualistic bacteria (e.g., in the human gut) can synthesize vitamins like vitamin K and B vitamins.
• Option b: They can compete with harmful microorganisms for resources or space, inhibiting their growth.
• Option c: Some mutualistic bacteria help in digesting complex or unused nutrients (e.g., fiber digestion in the gut).
• Option d: They can contribute to the immune system's defense by preventing pathogen colonization or aiding in immune responses against diseases.

Answer:

a. synthesis of vitamins, b. preventing the growth of harmful microorganisms, c. digestion of unused nutrients, d. defending against some diseases