Your answer is C: 2 billions years! Hope that helps!
The process of RNA formation from DNA is transcription.
The brain recieves stimuli. Your brain does a lot of things for you. It is one of the busiest organs in your body. Your brain stimulis can enjoy various brain stimulis games to keep your brain healthy and sharp. if it stays healthy, everything follows after.
The answer to this is the formation of first cells
