A description is a detailed verbal picture of something; a description question is generally asking for “just the facts.” This is not the place for opinions or speculation.
A simple description of an experimental setup would not be an adequate answer to the latter question.
Instead, you would need to describe that setup and talk about why it would be an effective method of measuring the result.
For example, a discussion question might ask you to discuss which of several theories offers the best explanation for a set of results.
A good answer here would go into detail about why one theory does a better job of explaining the results, and it would talk about why the other theories cannot cope with the results as thoroughly.
A question that focuses on contrast needs an answer emphasizing differences and distinctions.
The AP Biology Exam will test your understanding of the biological concepts covered in the course units, as well as your ability to utilize the scientific method and analyze data.
You can download and preview AP Biology test questions and answers in text format or you can download in MS Word format.
You may also be interested in traveling to the College Board and learning more about the AP Program and about AP Biology.
Each question will also need a certain kind of answer, depending on the type of question it is.
Part of answering each question correctly is understanding what general type of answer is required.