<span>The birth of more offspring than can survive.</span>
Answer:
<u><em>Ancestors</em></u>
Explanation:
Ancestors can be described as the persons from which a particular human being originated. In a broader perspective, it is referred to family history of a person. Scientists believe that all organisms on Earth originated from a common ancestor which were the prokaryotes. The prokaryotes with time gave rise to the eukaryotes. Common descent is the phenomenon in which organisms having common ancestors are referred.
As fas as i remember 20% of whole cell is RBC
so the answer is 2×10^13 !!
