Answer:
which of the following???????
I believe you meant to say is this mistake called a base pair and if that is your question then no. it would be called Mutation. But you can double check that answer.
The actually speed of sound in water is 1,498, which is closest to 1,500 meters per second.
-Steel jelly
B. tears , this is not a first line of defense

your answer is given below..
The environment is rich in infectious agents that transmit disease through pathogens.