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I answered boiling [C] in the exam. I think it could go either way really, as with a number of other 'dodgy' questions. I suppose there's no point going over it in my head. :wavey:

You definitely have a point. Although, the diagram is a bit unclear as to whether a stopper was included or not in the experiment. As for your second point, I am curious myself as to whether just because the broth appeared clear of microbes on day 1 it means they were not exposed to microbes...

I really hope you're right. I only got number 19 different, I had no idea and picked A which I feel is definitely wrong.

I put Vasoconstriction too :S I said there would be a slight change in colour in the rats extremities (tail, legs) I also said it's raised fur to create a layer of heat.

I had the exact same reasoning. Hope it was right.