<span>
are always unicellular
may have evolved from prokaryotes
</span><span>are more primitive than prokaryotes
</span>
It is observed that the human population keep increasing significantly and it began to increase noticeably around 10,000 years ago.The greatest factor of this increase is the rapid development of the agricultures in lands, as well as the domestication of animals. These are the reasons why population increases at that time.
Some Bio life has its own ways of surviving like animals will have more fur if they are in a cold area or Plants being able to survive in the cold
Human and the natural ones can change the ecosystem