What organic compound is used in order to break (“unzip”) bonds between the nitrogenous bases so replication can occur?

Helicase

Explanation:

Helicases are enzymes. They break the hydrogen bonds, using ATP energy,  between the nitrogenous bases of the two strands. This allows the DNA polymerase of RNA polymerase to access single-stranded DNA for replication and transcription respectively.

some fungi obtain their nutrients from a living host (plant or animal) and are called most biotrophic fungi have fairly narrow host ranges—they are specialized on a limited called rhizomorphs that allow the fungus to grow from one tree to another. ascospores are formed inside a sac-like structure called an ascus. so your answer is a

colors do exist. the color of the sky is actually violet; humans percieve the color of the sky as blue.