Scientists in a particular field strive for the same quality of work because they know their peers will be reviewing their scientific claims. what does this review process ensure?

The review process mentioned is called peer review and it is when the scientists work and research is put to the scrutiny of other experts in the same field of research to check its validity (making sure it's claims are correct or justified) and evaluate whether is is a suitable piece of work for publication.  So it's for validity of the work and whether it can be published.

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.