In the discussion you must describe why the experiment did not give the results you expected.
Maybe your initial hypothesis was wrong, but maybe there were some flaws in your experimental design or method.
They all usually refer to the same and are just different terminologies used by different journals.
Most biological science journals require a structured or unstructured abstract of 150-300 words for full-length research articles.
Use graphs and tables as they are easier for people to understand easily.
Be careful not to put in lots of graphs just for the sake of it.
It is a good idea to include a list of all the equipment you used and step by step instructions on what you did. In this section, you should not discuss what your results mean; only what you found.
You must try to be exact and give numbers instead of just observations.
This makes sure that somebody who is interested in your subject can find out a little more.
For a book, you should include the name of the author, the title, the date it was written and the page numbers of where you found the information.