The goal of this plant biology science fair project is to make and test an herbicide made from the leaves of the black walnut tree and investigate the toxicity of black walnut trees.

Transpiration is an important plant process that releases water into the air through the stomata in leaves. This resource describes the process, the role the stomata play, factors that have an impact on transpiration, and why it is so...

Describes stomata and their functions in photosynthesis, transpiration, and regulation of water retention and loss by plants.