Question

Which of these best demonstrates mutualism between certain types of bacteria and humans?

1.Intestinal bacteria obtain nutrients from the gut and produce vitamin K used by humans.

2.Bacteria become resistant to antibacterial medication that humans use for treatment.

3,Invasive bacteria at an area of injury produce toxins that damage healthy tissues of the human body.

4.Bacteria in improperly prepared food is consumed by humans, causing food poisoning.

Answer 1

1 is your answer

Step-by-step explanation:

Mutualism is where one organism helps another organism where both benefit and none are harmed