Pictures that we receive from space are of what

Describe the response the kidneys have to dehydration and excessive water intake. what happens to the concentration of urine in each case ?

Me with these questions image attached

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?