Dr. Grants research team found that twenty-five percent of the genetic code for the initial building blocks for nervous systems in all living animals is found in single-celled animals such as yeast. I infer an evolutionary process is responsible for causing the creation of, and initializing the other genes enabling animals to possess a capacity for neural systems within their living systems.
The entire podcast 51 was a breath of fresh air. Citation 14 inside my tome, A Treatise on the Nature of Life references the paper Dr. Grant wrote. Dr. Campbell did an excellent interview, and Dr. Grant is an exceptional teacher to the layman.
If you're not well versed in science and would like another clue leading to evidence which points to the existence of a Creator, I recommend a listen to the podcast. What Dr. Grant explains and leaves the listener to conclude as a result of his research is, as Spock would probably, indubitably say, "Fascinating, Captain."