Cell division is related to which of the following processes of an organism? A.
repair
B.
growth
C.
reproduction
D.
all of these

When you run, you begin to breathe heavier and faster. your heart beats more quickly, bringing more oxygen to your cells. which organ systems are working together here?

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?

This is the interaction of two organisms where one is and the other is neither nor harmed.