the parents supllied diffrent allieles C)
If he tries it with more than one willow tree, different amounts of water, and or soil.
In plants, the transpiration stream is the uninterrupted stream of water and solutes which is taken up by the roots and transported via the xylem to the leaves where it evaporates into the air/apoplast-interface of the substomatal cavity. It is driven by capillary action and in some plants by root pressure.
B is the answer and I hopes this helps
