Antibiotics are, initially, molecules naturally synthesized by microorganisms to fight against bacteria competing with their environment. This created a pressure of selection on the bacterial populations, leading to the appearance of resistant strains. In fact, when an antibiotic is used, only bacteria with defense systems against this molecule survive (and reproduce).
hope this helps
Answer:
D is the correct Answer
Explanation:
it is D because there is a difference bewtween them so watch what you selected please
C. <span>When water in a lake freezes, it floats, providing insulation for organisms below.
This </span> best describes an effect of the low density of frozen water in a lake.
Answer:
D
Explanation:
This is because the atmosphere is refreshable and makes breathing so conducive.
