the answer is D) repressor
Answer:
it is important because if their aren't any mutations then animals that find themselves in a new environment will die, and without it scientists cant study it so that they can help animals or humans.
Explanation:
Answer: Option C
Explanation:
All the communicable diseases are contagious. They spread from one person to another person.
They are transmitted by the common routines that we do in our daily life like sharing some stuffs, sharing the towels, using smart phones of some other person, sneezing, coughing, et cetera.
These diseases are common cold, flu which is transferred from one person to another.