The study of which structure was instrumental in the formulation of the modern cell theory?

In the item, we are asked to identify the study of which structure was instrumental in preparation for the formulation of modern cell theory. The scientific study is named DNA molecules. Modern cell theory has given rise to many scientific advances especially in medication.

Study of DNA was most instrumental in formulation of the modern cell theoy, which states that cell are capable of reproduction, and function, and heredity, along with being a structure. It also stated that some organisms are made up of more than one cell.

By water evaporation from the leaves is created a negative pressure at the top of the tree that promotes the ascension  of the water through channels that are called xylem. there are also two molecule forces that are involved: the intra-water molecules cohesion (water molecules stick to each other) and the adhesion when the water molecules stick to the channels they are running in. this is what enables water to go from the roots to the top of a tall tree.

The answer would be d. pili