ANSWER:
Radioactive element life years = 1000/2 = 500yrs.
So, Rock years
- 6.25/100 × 500
- 31.25years.
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
Cos Dna contains deoxyribose, Rna ribose
<span>Leukocytosis is an increase in the number of white blood cells whereas Leukopenia is an abnormal reduction of white blood cells, giving rise to a significant immune-suppression.</span>
