An is a genetic characteristic that allows an organism to survive and reproduce. These genetic characteristics usually spread throughout an entire , rather than being isolated to a single organism, as a response to the . Adaptive characteristics vary between organisms. Some organisms, like geese, respond to seasonal changes by traveling to a new area. This is known as . Polar bears do not travel but instead store layers of to stay warm through the cold winter.

regulation of gene expression. gene expression can be regulated by various cellular processes with the aim to control the amount and nature of the expressed genes. these regulatory proteins bind to dna and send signals that indirectly control the rate of gene expression

explanation:

b.

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.  

allowed for the prediction of the properties of missing elements.