What is a name for organisms that don’t perform photosynthesis?

The chemical form of energy that is useable by the cell to do work

When lactate builds up in a runners muscles it causes a burning sensation what causes this to occur

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?