This experiment is designed to study biotic/abiotic factors affecting seedling growth. Biotic factors are interactions between the living components of a community (i.e., predation, competition); ...

since this year's seeds won't germinate until next spring. Instead, if you plan a "bioassay," consider using seeds from a widely available and rapid germinating plant (such as sunflower, alfalfa, or ...

In 1634, Jan Baptist van Helmont was arrested by agents of the Spanish Inquisition for the crime of studying plants and other phenomena. While under house arrest, he started to consider how plants ...

He concluded that the tree grew by drinking water. Students could replicate the experiment using cress, but instead of focusing on the soil uptake, give the plants different quantities of ...