During their biology class on Thursday 30 September the 6e students were introduced to eco-systems and more specifically the plants that change shape over the seasons, their capability to resist to external factors not always conducive to the survival of living beings. The students studied the resistance to cold of chestnut tree buds and the ability of daffodils to spend the winter in the form of a bulb. They then produced a scientific observation diagram of a longitudinal section of garlic.