Um, they’re wrong. Your CORRECT answer is 13 billion years ago.
Answer:
The answer is they have eukaryotic cells.
there will be changes in the number of chromosomes
Answer: evolutionary adaptation
Explanation: evolutionary adaptation is simply the process of change through which organisms undergo to become better suited to its environment. These changes may be physical or behavioral or both and in every instance, the organism is better able to face and overcome its environmental challenges. Evolutionary adaptation enables a species or individual improves on its ability to survive and subsequently pass on its genes in relationship to the environment.
