n Southern blot hybridization, a labeled probe DNA is applied to a population of DNA molecules that have been separated by size using gel electrophoresis. The goal of this procedure is to: Determine the molecular weight of the DNA molecules on the gel. Identify a DNA molecule whose sequence is complementary to the probe. Ensure that fragments of different sizes separate on the gel. Identify a DNA molecule that contains the same label as the probe. Visualize all DNA molecules on the gel.

b - the respond is innate and varies over time.

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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.