CER format please I would appreciate it so much !!

Ivan is looking at a cross section of a stem taken from a vascular plant. he sees two different types of vascular tissue: the xylem, which is closer to the center of the stem, and the phloem, located around the xylem, closer to the outside of the stem. how do these two structures work together in a living plant?

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

The arrows in the illustration point to