How do plants survive without sunlight?
A plant cannot survive without sunlight or a source of sunlight. Fluorescent lighting can take the place of sunlight for a plant if sunlight is not possible.
Plants rely on the sunlight for the process of photosynthesis which provides the plants energy. Plants (or anything that uses chloroplast organelles an an energy source) cannot grow without sunlight. But if you mean something like Mushrooms, they are not plants. They are Fungus and they like shaded areas so they don't need any sunlight to survive.