Consider the evidence that explains how the physical separation of two populations of a species can cause speciation. What effect does physical separation have on organisms that might result in speciation?

Cells tend to have a relatively small and uniform size. why aren’t cells larger?

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?

What can happen to an enzyme as tempature rises