In the body of a human or other complex organism, a group of similar cells performing similar functions is called a/an
a. organ.
c. organ system.
b. tissue.
d. cell.

Energy derived from hot rocks and fluids beneath the earth’s surface is

Differences between compact bone and cartilage

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?