Answer:
C
Explanation:
because antivirals are drugs and antibiotics cab o nothing to viruses it is not even effective for the common cold So mosquito repellent would be the best choice
Answer:
Due to urease activity, bacteria are able to use urea as a sole nitrogen source and produce ammonia, which increases the pH in the proximal environment, causing Ca2+ and CO32- to precipitate as CaCO3.
B. DNA.
hope this helped!