2. Identify the structure of the DNA molecule.

See the answer below, please.

Explanation:

DNA is made up of nucleotides, which are composed of: phosphate group, sugar (deoxyribose) and nitrogenous base (adenine, cytosine, guanine or thymine). These nucleotides join together to form a double spiral-type chain (the double helix). In the base matings by hydrogen bonds: adenine pairs with thymine, and guanine with cytosine (this is inside the double helix and the sugar-phosphate skeleton on the outside).

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.