Which is not a way that bacteria can be beneficial?

a
bacteria turn milk into yogurt.

b
bacteria in the human gut with digestion.

c
bacteria evolve and become resistant to antibiotics.

d
bacteria create soil by aiding decomposition.

12. calculate the hydroxide ion concentration of a solution with ph = 3.25. show all calculations leading to an answer

People who practice which of the following diets may run the risk of not getting enough iron. a. gluten free or vegan diet b. diet for managing diabetes c. vegan diet d. gluten free diet

Which of the following involves only abiotic factors? a. a large rock being weathered by wind and rain b. an otter using a stone to break open a sea urchin c. a spider building a web in the corner of a building d. a pine tree absorbing light from the sun