Which of the following processes makes producers so unique

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 statement best compares aerobic and anaerobic respiration

Omg substrates with the same size and shape as the active site will bind to the enzyme. why is the key labeled the “bad” substrate?