Which characteristic of water allows for a spider to glide across the top of the water due to the strong hydrogen bonds among water molecules?

A spider is small enough that its weight can be supported by surface tension, the relatively weak forces that hold water molecules together. Water molecules "bond" to other water molecules around them in all directions, so they tend to stick more strongly to their neighbors, forming a film-like layer across the surface

Cell division is important to single celled organisms because it allows the cells to reproduce. through cell division, cells make exact copies of themselves. when single celled organisms go through cell division, they make exact copies of themselves which is how they reproduce.