The answer that fits the blank given above is nine (9). The molecular clock is a technique wherein the biologists investigate biomolecules' rate of mutation in relation to time that the organisms diverged. In this case, the molecular clock shows that chimpanzees and humans diverged about NINE million years ago.
Answer -
(Eukaryotes)
Nucleus (N)
The nucleus function is the control and command center.
Reason - This is too obvious. I picked eukaryotes because it's basic cells for animilia. The nucleus is simple because it's obviously also a command and control for all common cells.
To avoid any injuries or emergencies <span />
Answer:
It was formed around 4.5 billion years ago when something the size of mars smashed into the Earth, which made matter fly into orbit.