Read the passage below. “Prior to the 1970s, scientists thought that new neurons could not be generated in adult brains. In the 1970s,
Dr. Goldman and Dr. Nottbohm discovered that hormones injected in adult songbirds could cause female
songbirds to develop new neurons.”
Which statement best exemplifies the scientific principle that was involved in this case?
New experiments do not affect science because science remains constant.
New experiments can affect future scientific explanations.
New experiments can affect previous scientific explanations.
New experiments yield untrustworthy data and should be carefully considered.

The correct answer is C. New experiments can affect previous scientific explanations.

Explanation: An experiment is a way of checking a phenomenon under specific conditions to analyze its effects or to verify a hypothesis. An example of this is the statement because before the seventies it was believed that new neurons could not be generated in an adult brain, however, after conducting an experiment on songbirds it was found that it was possible. Therefore, it confirms that new experiments can affect previous scientific explanations because new experiments can test hypotheses that modify previous explanations. So the correct answer is C. New experiments can affect previous scientific explanations.