The use of studying it, she mentally responded the bored Slytherin, smirking, is probably so that we know what those are and they won't eat our fingers.

Turning back at the professor, Nadia considerd the answer for a minute.

"I supposse they have many ways to take water. It could be simple drinking, seeing it does has a mouth. It could be by absorbtion of the humidity around them and on/though their leaves. The idea of taking it from its pray sounds possible too. Or it could use the smaller, hidding roots they have and which would use by plugging them to the earth when they need it. They are stuck to the floor only in those occassions, I believe."

She was pretty sure that was what the professor had said last term class - but, for some reason... why couldn't she remember? She was commonly very good remembering. Once again, her distracted mind was put back on the class without many minutes of difference.

"So they loose their leaves, uhm..." *raise hand* "Sorry, professor, but what does the Dransul looks like without the leave-camuflage?"