Billy and Meg were both students attending college in Atlanta, GA. They were contacted by Meg's Aunt, who lived in Atlanta, about doing some plant sitting while she and her husband were gone. "Meg" said Aunt Iris, "I need you and your friend to take care of our house plants, patio garden, and in-ground vegetation while Herb and I are on vacation for a few weeks." "We will pay you $20/day to check on the plants and make SURE that none of the die," added Herb. "Some of these plants were part of my research at State University." Meg and Billy jumped at the chance to make some easy money. "How hard could it be to watch some plants grow?” Billy asked Meg. Billy and Meg went over to Aunt Iris and Uncle Herb’s house to start their plant sitting duties. The found a detailed note which explained how to take care of all the plants around their property. "This will be easy and quick," commented Meg to Billy. Sure enough, both students had some exams and extracurricular activities planned over the weekend and forgot to take care of the plants. They showed up on Monday morning to find almost all the plants wilting and starting to turn color. "We are going to loose our money and my relatives will never speak to me again," wailed Meg. "Don't worry," said Billy "I have an idea that will get us out of this mess." "I have some friends in plant physiology lab this semester.” “They owe me a favor, let's bring the potted plants to their lab class to find out what to do.”