Which enzyme is responsible for “unzipping" the dna by breaking the hydrogen bonds between the nucleotides?

As global warming continues the ocean absorbs more of the earth's heat what term describes the ocean as a storage location for heat a) heat binb) heat sinkc) heat storaged) heat vent( answer this for me)

In the diagram below, the northern hemisphere would be in what season at position a a.fall b. winter c.summer d.spring

In this experiment, the was intentionally manipulated. it is the independent variable. the dependent variables that were measured were the