The most basic reason that cells are stained is to enhance visualization of the cell or certain cellular components under a microscope. Cells may also be stained to highlight metabolic processes or to differentiate between live and dead cells in a sample.
A contour interval is the lines on a topographic map that state the height (from sea level) of the hill, valley, mountain or the ground level.
Scientists classify rocks based on texture, composition, and how the rocks formed.] Rocks are classified by how they formed.
venus is most similar to earth in terms of mass and diameter
