Hello anyone here actually tall im 5'1

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?

Scientific evidence is most likely to be consistent if it is based on data from

Which feature would you expect to find in a population in which sexual selection depends on male competition?