tell me how from a single cell a complex organism is formed, when scientist can't even explain it.
When I read this I immediately thought of Richard Dawkins and J.B.S. Haldane. The passage I'm about to type is from the book The Greatest Show on Earth and will illustrate a much better response than I could ever give.
That irascible genius J.B.S. Haldane [...] was once challenged by a lady after a public lecture. It's a word of mouth anecdote [...] but this is approximately how the exchange went:
- Evolution skeptic: Professor Haldane, even given the billions of years that you say were available for evolution, I simply cannot believe it is possible to go from a single cell to a complicated human body, with it's trillions of cells organized into bones and muscles and nerves, a heart that pumps without ceasing for decades, miles and miles of blood vessels and kidney tubules, and a brain capable of thinking and talking and feeling.
- JBS: But madam, you did it yourself. And it only took you nine months.
*Dawkins, Richard. (2009) The Greatest Show on Earth. (p. 211). New York, NY: Free Press.
I hope that gives some light on how erroneous your comment is. If biology can transform a single cell into trillions over the course of nine months just imagine what it can do in 3.5 billion years