In terms of reproduction, what is an example of a dependent relationship between a plant species and an animal species? What do you think would happen if the population of one of the species decreased?

What’s the student’s scientific question

Number and variety of living organism; includes genetic, species, and ecological types

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?