A sugar, a phosphate group, and a nitrogen base form the building blocks of which organic compound?

Apopulation of black bears depends on salmon from a stream for food. if a drought causes the stream to run dry one year, how will this likely impact the black bear population?

What kind of bond is created by the attraction between atomic particles of opposite charge? ionic bond hydrogen bond covalent bond nuclear bond

What happens when a scientific theory is shown to be an accurate description of a phenomenon?