HomeMessagesFunny MessagesJokesJokesJokes Jokes No Comments You enter the laboratory and see an experiment. How will you know which class is it? If it’s green and wiggles, it’s biology. If it stinks, it’s chemistry. If it doesn’t work, it’s physics. READ MORE: Jokes Share You Comments & Feedback Cancel reply This site uses Akismet to reduce spam. Learn how your comment data is processed.