Why might a microscopist, who specializes in the use of microscopes to examine specimens, use a light microscope instead of an electron microscope?

How does human environment effect the biosphere

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?

Why is the statement not a hypothesis? sunflowers require soil and plenty of sunlight and water to grow and thrive.