Do u mean- on brainly?
I'm pretty sure there are about 13million who actually use brainly so
if that's the right answer u were looking for then there u go lol
Answer:
.
Explanation:
To explain the last sentence, what I mean by that is the sudden decrease in air pollution in just a few weeks is what would have typically taken multiple years to do. Due to less drivers, factories shutting down, and more, less toxic and infirm mental hazardous chemicals were released into the atmosphere in an extremely short amount of time. However, nowdays, it is almost back to where is was before the pandemic.
If you compare the original DNA with the mutated DNA, the first C got “substituted” by an A after the mutation.
So the answer is (C) substitution.
It is tested with the blood gas test
The greenhouse effect.
Hope this helps!
-Payshence xoxo
