If scientists wanted to learn more about evolutionary history, they would study all but one of these molecules. which biological molecule would not offer much information about the history of life? a) dna b) proteins c) nucleic acids d) phospholipids

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?