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.
D) when cells are express different genes
All mackerel live in the water because all fish live in water and mackerel is a fish
Answer: B and C
Explanation: Both are below 6 on the scale so their not as hard or tough.
The answer would be false because some organisms have a possibility at failing other things.
