If a molecule has carbon and hydrogen, does that mean it's organic?

What are some characteristics of a free enterprise economy?

Is a measure of the different types of organisms in a community. question options: tertiary secondary primary none of the above

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?