The amount of magnetic flux that rises up to the Sun's surface varies with time in a cycle called the solar cycle. This cycle lasts 11 years on average. This cycle is sometimes referred to as the sunspot cycle. Near the minimum of the solar cycle, it is rare to see sunspots on the Sun, and the spots that do appear are very small and short-lived.
exists and is an alternate of . Making the world better, one answer at a time. The three main parts of the cell are the cell membrane (surrounds and protects the cell), the cytoplasm (the liquid inside the cell), and the nucleus (control center of the cell). Minor edit?
A cell is the smallest unit of a living thing and is the basic building block of all organisms. State the general characteristics of a cell. 1  A living thing can be composed of either one cell or many cells.  There are two broad categories of cells: prokaryotic and eukaryotic cells.