Students in a biology laboratory course were growing pea plants for their genetics experiments. One lab group decided that since plants need water and nutrients to grow, they would test several nutrient-containing solutions diluted by 50% in water. They ‘watered’ each of their test plants with a different solution: milk, orange juice, soup, or pure water (control). After a week, they measured how tall their plants had grown. Were any of these solutions more beneficial to the plants than plain water? the soup broth was just as good as water, since it contains ions such as sodium and chloride the orange juice was the best, since it already contains the sugars that plants would normally make themselves the milk was better than the water, since it contains all the macromolecules yes, all of them – they are all isotonic to the plant cells no, none of them - they are all hypertonic to the plant cells