2) this is the process of determining a specific age of an object.

The body is protected against harmful flu viruses by

In the practice of science, this type of reasoning is used to develop explanations.

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?