OK, so we all know that, despite doing biology and having a textbook with precise and relevant information in it, the examiners still like to ask questions, which- let's face it- have nothing to do with biological knowledge whatsoever, or even the stuff we learn on the course. These questions are really 'take a wild guess' questions, and need luck more than anything else.
Such as this one:
Courtship and mating in fruitflies can occur equally well in the light or dark. Frutiflies which mate in the dark are much more likely to produce offspring than those which mate in the light. Suggest an explanation for this.
What would you say?
The answer is predation. Yep, despite not even having a mention in the textbook, that's the answer. How silly.
It's not the questions that ask us directly on the course that frighten me- it's the ones where you have to take a stab in the dark like this that terrify me, and everyone I suspect.