Answer
Scientists studied the genomes of more than 1200 indigenous African living in the southern part of the continent today , they pieced together a history of one of the oldest DNA's . Which is passed down maternally through the mitochondria and has survived remarkably unchanged in some populations for hundreds of thousands of years.
Explanation:
It is 24,901 mi. p.s u can also look it up on Google
Answer:
None of these.
Explanation:
None of these seem right to me. If that is not the answer I would go with an increase of erosion in the soil.
Explanation:
The positive charge on a proton is equal in magnitude to the negative charge on an electron. As a result, a neutral atom must have an equal number of protons and electrons