I actually did have my 4-hour (the shortest of all, all the other ones are 6-hour) final biology exam today. Better than expected, considering how much I have been slacking rather than studying.
... and of course the most obvious of all the things asked - I would have never expected something as easy as captioning a leaf being a task in a final exam - had to come to my mind just as I enter the car, 5 minutes after the end. Now I'll never forget again that wall-skin-whatever-thing is called epidermis... which will be a waste of brain space seeing as I'm never going to need that knowledge again.