Generally, the sun observes a solar cycle of eleven years. In this cycle, there are fluctuations in the activity, such as the ejected levels of solar radiation, and in the appearance of the sun, such as changes in the amount and size of sun spots, solar flares and other phenomena that occur on the sun's surface.
These changes also affect phenomena on earth, especially the auroras.
The sun is the ultimate source of energy and the process is Photosynthesis.
Cell membraine i hope that help
the <em>sun's corona</em> is only visable when there is a solar eclipse
Ribosomes- Organelles that help in the synthesis of <span>proteins.</span>
