This might not be the right one but I think its the first one...........................
The answer to this question is <span>The students' expectations about the rats' performance influenced their observations and behaviors
When the students heard a term/label imposed to a subject/object, we will initially expect that subject/object act according to their labels.
Another example would be, when someone tell you that a bread is poisonous, you will automatically expect whoever eat that bread to start choking or vomiting blood.</span>
Yes an amendment can be proposed
Organisms (belonging to the same species) may adapt in different ways to better exploit different environments or resources-- survival of the fittest. They also may evolve varied characteristics for attracting mates for reproduction. This means that different groups evolve differently. Over time, these groups or populations may become so different that they can no longer breed together -- and separate species are formed.