What's the hardest part of eating a vegetable? The wheelchair (credit to my physics teacher's wife)

A Worm Student tries to pass a test in biology. Student is bad in sciences. His glance is wandering through the audience helpless. Eventually he sees a flower pot. On the flower sits an earthworm. *Herr Professor,* - says the student, - *I bet that I stick this worm into the ground!* Professor takes up the challenge. Student calmly takes the worm, squeezes some glue on it, blows on him - a worm freezes - student gently sticks it into the ground. Herr Professor says: *Well, you've passed the test…

hydroxyl ions A physics professor and his assistant are working on liberating negatively-charged hydroxyl ions, when all of a sudden, the assistant says, ""Wait, professor, what if the salicylic acids do not accept the hydroxyl ions?"" And the professor responds, ""That's no hydroxyl ion; that's my wife!""

A professor turned up to the class with two rats in a cage.. The professor showed a large cage with a male rat in it. The rat was in the middle of the cage. Then, the professor kept a piece of cake on side and kept a female rat on the other side. The male rat ran towards the cake and ate it. Then, the professor changed the cake and kept some bread. The male rat ran towards the bread. This experiment went... on with the professor changing the food every time. And, every time, the male rat ran tow…