Dr. francis crick's 1970 paper, central dogma of molecular biology, was on the biopolymers (dna, rna, and protein) and the "transfers" between each polymer both the original categorization of transfers from 1958 and then his proposed new groups re-organized transfers.
"in the old categorizations of information transfer he lists transfers that "almost certainly existed", transfers that were "rare or absent" and those that were "unlikely to occur". what biopolymer transfers fell into these categories? "

answer:

the water molecules are transferred from the roots to the stem or top parts of the tall tree because of important properties of water which are adhesion, cohesion and capillary action. cohesion is the property of water molecules keeps water molecules in a combined state by sharing of bonds between them at the atomic level. adhesion allows the interaction of water molecules with other substances or substrate. adhesion will cause the attachment of water molecules to the wall of the vessel (xylem) of the plant. capillary action occurs when the adhesive force to the vessel wall is stronger than the cohesive force between water molecules. capillary action mimics the transfer of water from a tube or pipe. in this way water utilizes its property to transfer water from down to top level of the plant.  

stimulus is a change in the environment that causes an organism to react. the response is the reaction to the stimulus. some examples of stimuli for zebras are drought, to many predators, and bad feeding grounds such as dead grass or plants. zebras respond to stimuli just like all other living organisms