Activity: Students investigate the hairiness trait in radish plants. They count hairs on plants and represent their data on a class graph. They find that variation in a population can be described by identifying the “mode” (the tallest stack of data values) and the “range” ( the lowest and the highest value). They speculate about what future generations of radish plants will look like if the environment stays the same or changes, for example, if hungry caterpillars arrive.