When you exhale into a cold window pane, water vapor in your breath condenses on the glass. where does the water vapor come from?

Which of these is not a nucleotide base found in dna?

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?

Use the distance formula to determine weather each pair of segments have the same length