When a salt dissolves in water, it produces either a hydrogen ion or a hydroxyl ion. truefalse

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 organ controls breathing? lungs alveoli heart diaphragm

Dna replication occurs in preparation for