<span>The types of effects that the surgery had on the rats were documented with their bar-pressing behavior. The differences and changes from the injections effected the rats in certain ways. The location of the injection and which types that was more pleasurable for the rat is something that needs further investigation.</span>
The first choice is correct
Bibliography is essential in determining its content. I hope this helped
plutoids hope this helps :)
Answer:b
Explanation:
It will only be found in some cells because when a mutation is formed it will most likely not be able to spread